pongoglo
Active Member
Just wondered if this was possible - and if not - why not? Obviously you would have to wear a mask and take the necessary precautions, but has anyone done this, and if so any tips as to whats the best kit to use?
using a spray gun to apply antifoul??
- Thread starter pongoglo
- Start date
Aja
Well-Known Member
Not only would you have to wear a mask - but everyone else in the vicinity!
Mask off your boat, the next boat and the boat next to that one too I would imagine.
Donald
Mask off your boat, the next boat and the boat next to that one too I would imagine.
Donald
Poignard
Well-Known Member
Reminds me of the time my boat was laid up in a shed at a certain South Coast boatyard and a fathead employee of the yard turned up in full protective clothing and started dry sanding the antifouling off the boat next door. Seemed genuinely surprised when I complained.
Sans Bateau
Well-Known Member
I you used a HVLP spray gun then there should be little overspray, unless it was windy. You'd have to thin the AF down a bit though.
VicS
Well-Known Member
Technically yes. I have just checked and I find my A/F, International Cruiser Uno, can be applied by brush, roller, airless spray and airmix spray.
I did not follow it up but I imagine the paint will have to be thinned to suit the spray equipment being used. That may mean measuring viscosity to get the mixture correct and I imagine will result in several coats being required to acheive the necessary coating thickness.
You should check the product data for the A/F you are thinking of using and the instructions for the spray equipment.
Safetey considerations may require you to work in an enclosed building with fume extraction and filtering. You should check the product safety data as well.
I did not follow it up but I imagine the paint will have to be thinned to suit the spray equipment being used. That may mean measuring viscosity to get the mixture correct and I imagine will result in several coats being required to acheive the necessary coating thickness.
You should check the product data for the A/F you are thinking of using and the instructions for the spray equipment.
Safetey considerations may require you to work in an enclosed building with fume extraction and filtering. You should check the product safety data as well.
nedmin
Well-Known Member
As others have said it is possible,but whats the point its pretty damned lethal stuff so why not use a radiator roller on a radiator type holder so that you can keep out of the way.Quality of finish doesnt matter as the surface leaches away to automatically smooth it off in a short period of time.
gianenrico
Well-Known Member
If You go to any launching pad where Beneteau, Jeanneau or Bavaria are commissioned and launched at the rate of 3 to 4 a day during a 90 days period, you will notice, among other things:
AF is spayed on;
cleaning of deck is done with HOT water pressure.
Cheers
AF is spayed on;
cleaning of deck is done with HOT water pressure.
Cheers
CPD
Well-Known Member
My penniesworth is that I spray for a living materials with a similar consistency. I wouldnt bother given the amount of time for set up, masking, fine tuning and cleaning up. A roller is IMHO a much better bet and allows you a good close up inspection of the hull as you go. Only my opinion of course !
demonboy
Well-Known Member
You shouldn't add thinners to a/f as it comes in the correct consistency, unless otherwise stated.
Get the roller out, you lazy.... it doesn't take that long!
Get the roller out, you lazy.... it doesn't take that long!
pappaecho
Well-Known Member
I am not so sure. The recent PBO antifouling survey found that its long term performance was proportional to the thickness of the antifouling coat(s). For example a single roller coat was thinner than a paintbrush coat, so two roller coats were needed to give the same performance.
I suspect that most antifouling products which are sprayed on are thinned down with solvents and so the coats are thinner, and hence several coats will be needed to provide the same barrier thickness as a single coat of paint applied by paintbrush.
I would also have very severe reservations about breathing aerial dispersions of antifoul, which are not good for human health!
I suspect that most antifouling products which are sprayed on are thinned down with solvents and so the coats are thinner, and hence several coats will be needed to provide the same barrier thickness as a single coat of paint applied by paintbrush.
I would also have very severe reservations about breathing aerial dispersions of antifoul, which are not good for human health!
VicS
Well-Known Member
[ QUOTE ]
You shouldn't add thinners to a/f
[/ QUOTE ] Yes you are correct. The data sheets give the tip sizes for spraying
You shouldn't add thinners to a/f
[/ QUOTE ] Yes you are correct. The data sheets give the tip sizes for spraying
Birdseye
Well-Known Member
We have a member who sprays on his antifoul every year. Keen racer type, sands it down afterwards (bit anal?) to get a really smooth finish. Doesnt generate much if any problem with the boats next door since he choses his days.
In any case, my car once got thoroughly antifouled by some muppet using a roller over vigorously on a windy day. As luck would have it, it was an almost exact match for the cars paint, but it took some getting off.
personally, I reckon it takes longer spraying it as opposed to using these disposable small rollers.
P.S. Was treated to the sight in a Spanish marina of a boatyard employee up the mast of a 40 footer spraying the mast whilst the boat was afloat. Needless to say, most other boats in the marina got overspray. But then they also did when the yard sprayed boats in the compound.
In any case, my car once got thoroughly antifouled by some muppet using a roller over vigorously on a windy day. As luck would have it, it was an almost exact match for the cars paint, but it took some getting off.
personally, I reckon it takes longer spraying it as opposed to using these disposable small rollers.
P.S. Was treated to the sight in a Spanish marina of a boatyard employee up the mast of a 40 footer spraying the mast whilst the boat was afloat. Needless to say, most other boats in the marina got overspray. But then they also did when the yard sprayed boats in the compound.
oldsaltoz
Well-Known Member
Having used an airless spray to antifoul I can assure you all it's very fast and very smooth when finished and performance is also good using a single coat.
The airless provides a fan shaped flow of un thinned antifoul, a couple of passes over a bit of cardboard sets it up. Masking is made easy using the tape with plastic sheet already joined, clean up is simple and takes less than 10 minutes.
The cost is high if you have to hire the spray rig, so get a few others together and spray a few boats on the same day sharing the hire cost.
Andavagoodweekend......
The airless provides a fan shaped flow of un thinned antifoul, a couple of passes over a bit of cardboard sets it up. Masking is made easy using the tape with plastic sheet already joined, clean up is simple and takes less than 10 minutes.
The cost is high if you have to hire the spray rig, so get a few others together and spray a few boats on the same day sharing the hire cost.
Andavagoodweekend......
Clyde_Wanderer
Well-Known Member
Just a little word of warning.
Dont ever be tempted to spray towards any part of your body ( hands arms etc) with an airless spray gun, as it will inject the paint through your skin.
Their pressure ranges from 3000-5000psi, and they will spray thick paints like emulsions etc without thinning.
I used to repair them a few years ago.
Dont ever be tempted to spray towards any part of your body ( hands arms etc) with an airless spray gun, as it will inject the paint through your skin.
Their pressure ranges from 3000-5000psi, and they will spray thick paints like emulsions etc without thinning.
I used to repair them a few years ago.
alienzdive
Well-Known Member
Spraying antifoul is fine, it can also be thinned.
If for instance you need to put 10 litres on your hull, and thin 10% to make 11 litres. Spray it all on so that the original 10 litres gets coverage.
There will often be a litre in the line, make sure you chase this out with thinners too so as to get it on the hull too.
Get the correct tip size
Do not spray on a windy day,
Mask up correctly, 900mm high is sufficient
Turn the pressure down, it is not necesary to spray at max pressure. Turn it down to where a tail is evident in the spray fan and turn it back up a touch until the tail dissapears.
Make sure that all the filters are cleaned and the lines and gun are cleaned perfectly.
Spray with 50% overlaps.
Make sure that the gun is powerful enough to spray thick antifoul. many small airless guns do not have the power to pump antifouls.
I have also found that hire guns are not looked after and cleaned properly. When the antifloul reacts with emulsions from previous people the filters clog up as the two paints react.
If for instance you need to put 10 litres on your hull, and thin 10% to make 11 litres. Spray it all on so that the original 10 litres gets coverage.
There will often be a litre in the line, make sure you chase this out with thinners too so as to get it on the hull too.
Get the correct tip size
Do not spray on a windy day,
Mask up correctly, 900mm high is sufficient
Turn the pressure down, it is not necesary to spray at max pressure. Turn it down to where a tail is evident in the spray fan and turn it back up a touch until the tail dissapears.
Make sure that all the filters are cleaned and the lines and gun are cleaned perfectly.
Spray with 50% overlaps.
Make sure that the gun is powerful enough to spray thick antifoul. many small airless guns do not have the power to pump antifouls.
I have also found that hire guns are not looked after and cleaned properly. When the antifloul reacts with emulsions from previous people the filters clog up as the two paints react.
jimbaerselman
Well-Known Member
SWMBO, who does all paint jobs, advises me that girls should stick to rollers for this job.
First, it's silent, so you can hear all those gasps of admiration while you're at work. Second, it's not technical, so it's possible for all those gaspers later to trot up and make conversation. And third, she's had so many offers to borrow her skills (painting, crewing, maintenance . . . ) that she prefers to spend a minimum of at least two days at the job. Good for her ego, she sais. Much better than a nasty, noisy, technical spray job which others can't interrupt.
First, it's silent, so you can hear all those gasps of admiration while you're at work. Second, it's not technical, so it's possible for all those gaspers later to trot up and make conversation. And third, she's had so many offers to borrow her skills (painting, crewing, maintenance . . . ) that she prefers to spend a minimum of at least two days at the job. Good for her ego, she sais. Much better than a nasty, noisy, technical spray job which others can't interrupt.
TheBoatman
Well-Known Member
Why spray when rolling is quicker?
Peter.
Peter.
G
Guest
Guest
With commercial shipping in dry-docks of course its way its done ...
But as others advise - Not near my boat or another please !! And make sure if doing it at home - car, washing, house, garage, dog, cat etc. etc. are well clear of area .... about 1/2 mile should do !! /forums/images/graemlins/wink.gif /forums/images/graemlins/wink.gif /forums/images/graemlins/wink.gif /forums/images/graemlins/wink.gif /forums/images/graemlins/wink.gif
But as others advise - Not near my boat or another please !! And make sure if doing it at home - car, washing, house, garage, dog, cat etc. etc. are well clear of area .... about 1/2 mile should do !! /forums/images/graemlins/wink.gif /forums/images/graemlins/wink.gif /forums/images/graemlins/wink.gif /forums/images/graemlins/wink.gif /forums/images/graemlins/wink.gif
oldsaltoz
Well-Known Member
[ QUOTE ]
I used to repair them a few years ago.
[/ QUOTE ]
Now I know who to call when mine chucks it in, I'm testing bitumen emulsion thru it at the moment, not boaty though, just more waterproofing R&D.
Thanks Earmonn,
Andavagoodweekend......
I used to repair them a few years ago.
[/ QUOTE ]
Now I know who to call when mine chucks it in, I'm testing bitumen emulsion thru it at the moment, not boaty though, just more waterproofing R&D.
Thanks Earmonn,
Andavagoodweekend......
vyv_cox
Well-Known Member
If you take a walk around yards where big yachts are serviced, for example Palma Boatyard, La Ciotat, Barcelona, etc you will find that all of them apply A/F by spraying. All will be completely encapsulated in polythene tents and very well masked up before spraying starts.