Dinghy Spray Painting

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Sailfree

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No response in the Lounge and as it is (small) boating thought I would try posting here.

In the past I have sprayed my dinghy using an old JGA spray gun and 2 pack paint. There is a lot of oversray dust with a high pressure gun like the JGA.

My understanding is that car resprayers etc have now moved over to low pressure spraying.

Is it more difficult to get a good (car like ) finish with a low pressure gun and can anyone recomend a cheap one please?

I use 2 pack that requires a respirator but after SWMBO garden clear up now minus my 30 yr old compressor (2nd compressor) and large air receiver. 1 compressor left for respirator has anyone sucessfully rollered/brushed on two pack paint?
 
I would try putting the paint on with a brush or roller then tipping off with a paint pad.

If done correctly you can get a really good finish (and no overspray).
 
I , long time ago, used Perfection 709. Carefully brushed, looks good. Spraying needs VERY good respiratory protection, as in external supply mask. All 2 pac iso-cyanate are extremely bad for your lungs.I was using stuff that neglected to mention the risks, but had read elswhere.
Low pressure kits ( HVLP) are great, but the same rules apply.
Our local B+Q has good kits for circa 50 euros. A mask is not good enough, you must use a system with fresh air from filtered source.
A

Re-read your OP, The LP systems available from B+Q (our local equivelent is also Kingfisher)
are good, just you need to practise after using high pressure guns, all a bit different.
A
There is still over spray just a bit slower.... I moved on to electrostatic as the paint was expensive for grill work with a high pass through waste.
 
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I use a full face mask, fitted with a P3 organic mists and vapour filter, you don't need an airline fed respirator unless you are doing a lot of spraying or the organic vapour is robbing atmospheric oxygen. These masks are designed with this job in mind.
 
I remember spraying my pal's enterprise when we were 15. The ent was turn turtled, the wood sanded and faired to perfection, the wooden gunwhale masked and the white hull became blue. The paint looked as good and shiny as an expensive car and we came second in the next race, a place in the fleet we'd never seen (and never saw again until we started in big boats).
We were delighted with our efforts.
However my pals dad was not impressed by the black enterprise shape on the blue tinged tarmac drive. We couldn't see why it was such a big deal, but we were made to scrub the drive. And scrub, and scrub.
Sorry for the nostalgia trip, your question brought back memories! Can see why you want a method with less overspray, but no matter how well you tip after brushing I don't think it will ever be as good as spray.
 
Spray Mist

I have to take issue with Bobolinsky.
P3 masks are most definitely not designed for spray mist from some 2 packs.
2 pack polyurethanes release free isocyanates into the atmosphere when atomised which can paralyse the lungs if inhaled. Possibly OK for 2 pack acrylics but definitely not for polyurethane! Also fine for single pack paints, including polyurethane.
Don't just think about yourself but also anybody else who could breathe the vapour
 
Hurley24 said:
release free isocyanates into the atmosphere when atomised which can paralyse the lungs if inhaled.
Click to expand...

Agree that you don't want to inhale isocyanates, but they don't paralyse the lungs, which don't have any independent power of movement. You can paralyse the muscles of respiration in the chest wall and diaphragm, but isocyanates don't do that. What they can do is irritate the lining of the respiratory tract leading to fluid being secreted into what should be air-spaces, and they can also cause a narrowing of the respiratory passages as in an asthmatic attack. People vary a lot in their sensitivity to these substances, so a level of exposure which would be harmless for one person could have serious effects on someone different.
 
Quote.
I use 2 pack that requires a respirator but after SWMBO garden clear up now minus my 30 yr old compressor (2nd compressor) and large air receiver. 1 compressor left for respirator has anyone successfully rollered/brushed on two pack paint?End Quote.

You can avoid the hazards and get the perfect finish.

Do the prep, sand and prime, sand again then drop it off at the local panel beaters spray booth.

It will take them longer to clean the gun than it takes to apply 3 coats so it's not going to cost much at all. It's the time spent on prep that costs all the money. :eek:

Hope this helps.

Avagoodweekend......:rolleyes:
 
I still us A JGA Gun,( I paint commercial vehicles) The guns you mention are the HVLP High Volume Low Pressure.
There are a number of Copies on the market now, I have just bought a couple of Voylet guns for £35 each and they are really excellent.

Unfortunately you will get overspray even with the HVLP guns.

You can brush 2k paint, and I have achieved very good results with a roller as well (Gloss type) You will need to experiment with the paint viscosity to get the best finish.
I hope this helps
 
Re Alan D comments

Sorry about the abbreviation of effects. I'm not a medic but trying to keep the message simple - as in don't do it!
 
Sailfree said:
Is the overspray with a HVLP gun less than a JGA gun or similar amount please?
Click to expand...

Well I've been told on a number of occasions that HVLP guns put more paint on and cut down on the oversppray. but I'm not convinced.
With a normal gun as long as you regulate the air down you should not get that much oversparay.
The easiest way is to mask off the areas you don't want covered in overspray
Hope that helps
 
andybris said:
Sailfree, I see your based in the Solent.
If you want to trailer the dinghy up to me,(Nr Horsham) you could use our facilities.

Andy
Click to expand...

Thanks very kind offer. I will see how dinghy fits in my new (SWMBO designed) smaller garage. If it does, for convenience of working on it, I may have to buy a second compressor for face respirator. Really wanted to cut down overspray dust as well but I think adjusting pressure down on JGA is probably best option as its a gun I know.
 
Guidance on 2-pack isocyanate-containing paints is here. It is aimed at the motor industry, but the risk is the same with boats.

Take them very seriously. If you happen to be sensitive to isocyanates a single exposure to paint spray can be enough to cause disabling, life-long, asthma. P3 filters are NOT designed for use with sprayed isocyanate-containing paints.
 
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