Fergus
Well-Known Member
Do I need to sand/prepare if it had the same paint last year or just splodge it on? (hull is very fair anyway)
Thanks!
Thanks!
Micron Extra question
- Thread starter Fergus
- Start date
Rustyknight
Well-Known Member
Give it a wash and gentle scrub before-hand, give it a day to dry out and then splosh it on!
If time prevents the wash and scrub, just splosh it on.
If time prevents the wash and scrub, just splosh it on.
AIDY
Well-Known Member
I normally give hull a light key with 180 wet'n'dry first. if there is any old flakey paint it will require a bit more prep.. dont we love this time of year /forums/images/graemlins/smile.gif
pvb
Well-Known Member
I use Micron Extra, and prior to recoating I wash the old antifoul with a running hose and a 3M scouring pad. I find that a lot of the remaining antifouling is removed in this process, minimising the build-up of paint on the hull.
Robin
Well-Known Member
I rubbed ours down wet using a universally jointed abrasive sheet holder sold at specialist decorator supply stores (Brewers, in Old Wareham Rd Poole), this has a cut sheet of an (aluminium oxide?) abrasive grid clamped to it, like on an orbital sander. We have both long and short handles that screw into this holder and help add power, it is much easier than using wet/dry by hand with water running up your sleeves! We work as a team, SWMBO hoses the hull whilst I use the rubbing pad and doing it this way we did our 41ft boat in well under 4hrs even with breaks. Once you get going it creates a slurry which seems to make it easier but because the abrasive sheet (it comes in rolls in different grades) is in the form of a grid it doesn't clog like wet/dry and we used just one cut sheet per side of the boat. The gismo I'm talking about is used I believe for sanding plaster and ceilings but being for painters and decorators it is cheap, I bought 2 pads, 2 short and 2 long handles for around £10 and I think another £5 for enough abrasive sheet to last 5 years.
International say you can just freshwater wash down and repaint, but whilst it is the easy way you get a smoother finish, less build up and less risk of flaking patches later if you rub it down.
International say you can just freshwater wash down and repaint, but whilst it is the easy way you get a smoother finish, less build up and less risk of flaking patches later if you rub it down.
starboard
Well-Known Member
If you used Micron Extra last year why then do it again this year. I use it and as the manufaturer says it last's 2 years and I can confirm that. That's why it cost's so much!!!!
Paul.
Paul.
mikejames
Well-Known Member
Micron Extra : It lasts a bit under a year : I commit the sacrilege of doing the pressure wash on a pile, wait a bit until the hull isnt running with water and the old stuff looks dry. I then roll on one coat and wait a couple of hours and then the tide comes back in.
It really only has trouble sticking to the waterline as that is where the scum that comes off the mud at low tide deposits : a bit more enthusiasm with the pressure washer and that muck comes off.
Dont do this process with Micron Optima as that is water based . Generally the years use plus the pressure washer takes it back to last year's antifouling - I proved this by changing the colour from light to dark blue last year, and the light blue shows through with the pressure wash.
It really only has trouble sticking to the waterline as that is where the scum that comes off the mud at low tide deposits : a bit more enthusiasm with the pressure washer and that muck comes off.
Dont do this process with Micron Optima as that is water based . Generally the years use plus the pressure washer takes it back to last year's antifouling - I proved this by changing the colour from light to dark blue last year, and the light blue shows through with the pressure wash.
pvb
Well-Known Member
Yes, it\'s good for 2 years...
I can second this; if you follow International's instructions, Micron is fine for 2 years. I've been using it this way for many years - just lift the boat for a week in the summer every 2 years, the rest of the time it stays in the water. Well worthing paying extra for Micron - can be cheaper in the long run!
I can second this; if you follow International's instructions, Micron is fine for 2 years. I've been using it this way for many years - just lift the boat for a week in the summer every 2 years, the rest of the time it stays in the water. Well worthing paying extra for Micron - can be cheaper in the long run!
Danny Jo
Well-Known Member
Re: Yes, it\'s good for 2 years...
[ QUOTE ]
if you follow International's instructions, Micron is fine for 2 years
[/ QUOTE ]
The instructions, from the data sheet for Micron Extra, are: "If 2 seasons protection is required, apply 3 coats on the hull and 4 coats on the leading and trailing edges, waterline, rudder and keel." For Micron Optima there is only: "Apply 2 coats per season on the hull. 3 coats are required on the leading and trailing edges, waterline, rudder and keel."
About 20% of the area covered last year by "two coats" of Micron Extra (professionally applied) was back to the base coat after a brief pressure wash six months later. I'm crossing my fingers and hoping that my own application of two coats will last a bit longer. Why? Because I spent more on Micron at £70 per can (around £350) than I was charged by the yard last year (and I guess their price would have been around £100 per can). And because two coats on my 38 footer at the stated coverage of "25 sq m" per can should have used half the paint I that I actually used.
Some hope! If it does no better this year, I'll have to look for an alternative. Micron extra is very effective, but I wonder if it's worth it for a pensioner who can afford the time to dry out against a wall from time to time and scrub off.
[ QUOTE ]
if you follow International's instructions, Micron is fine for 2 years
[/ QUOTE ]
The instructions, from the data sheet for Micron Extra, are: "If 2 seasons protection is required, apply 3 coats on the hull and 4 coats on the leading and trailing edges, waterline, rudder and keel." For Micron Optima there is only: "Apply 2 coats per season on the hull. 3 coats are required on the leading and trailing edges, waterline, rudder and keel."
About 20% of the area covered last year by "two coats" of Micron Extra (professionally applied) was back to the base coat after a brief pressure wash six months later. I'm crossing my fingers and hoping that my own application of two coats will last a bit longer. Why? Because I spent more on Micron at £70 per can (around £350) than I was charged by the yard last year (and I guess their price would have been around £100 per can). And because two coats on my 38 footer at the stated coverage of "25 sq m" per can should have used half the paint I that I actually used.
Some hope! If it does no better this year, I'll have to look for an alternative. Micron extra is very effective, but I wonder if it's worth it for a pensioner who can afford the time to dry out against a wall from time to time and scrub off.
Sailfree
Well-Known Member
The Jeaneau distributor offerred to do mine last year as they had messed me around on some warantee work. I asked that they ensure the hull was scoured with a wet 3M's green scouring pad after pressure washing.
Visited boat to find the micron extra had been applied directly on to the pressure washed hull and judging from the uncoated part I could see not to clean either.
Not v happy but this year boat came out and antifoul was fine no peeling or flaking. Credit to the product not the applier but makes me wonder if I am not being a little to thorough and creating work for myself with the preparation.
Visited boat to find the micron extra had been applied directly on to the pressure washed hull and judging from the uncoated part I could see not to clean either.
Not v happy but this year boat came out and antifoul was fine no peeling or flaking. Credit to the product not the applier but makes me wonder if I am not being a little to thorough and creating work for myself with the preparation.
cookjwm
Well-Known Member
Re: Yes, it\'s good for 2 years...
on the east coast, quite consistently, two coats utterly fail to do a season. We lift in July approx, do another coat (so thats three) and she is a mess by October. It seems that one year one antifoul works and another it does not
on the east coast, quite consistently, two coats utterly fail to do a season. We lift in July approx, do another coat (so thats three) and she is a mess by October. It seems that one year one antifoul works and another it does not
pvb
Well-Known Member
Re: Yes, it\'s good for 2 years...
I think the key to success with Micron Extra is the eventual film thickness. Your "professionally applied" 2 coats were probably done quite thinly by roller, in typical boatyard fashion. I believe in brush application, to give a good coverage. Typically, I put about 8 litres on my 35ft long-keeler. If you've put 12.5 litres on your 38ft boat, it should be fine for 2 years.
The real benefit in a 2-year antifoul programme is two-fold: firstly, big savings in liftout costs; secondly, big savings in preparation effort.
I think the key to success with Micron Extra is the eventual film thickness. Your "professionally applied" 2 coats were probably done quite thinly by roller, in typical boatyard fashion. I believe in brush application, to give a good coverage. Typically, I put about 8 litres on my 35ft long-keeler. If you've put 12.5 litres on your 38ft boat, it should be fine for 2 years.
The real benefit in a 2-year antifoul programme is two-fold: firstly, big savings in liftout costs; secondly, big savings in preparation effort.
pvb
Well-Known Member
Re: Yes, it\'s good for 2 years...
I'm on the East coast. Do you apply by brush or roller? You have to put enough on to get the long-term effect.
I'm on the East coast. Do you apply by brush or roller? You have to put enough on to get the long-term effect.
Binman
Well-Known Member
Re: Yes, it\'s good for 2 years...
Old post but suits my purpose, I'm thinking of using Micro extra two this season, in 2014 I applied Gell shield 200, 6 coats,then used Crusier Uno EU, most now gone, could I do a rub down and apply the micron extra two, or do I need a primer first. I did find a web site which gives you what to use depending on the area you sail in, it listed Crusier uni as the one to use or tiger extra from Hempel, Chatham same as Thames area. Using the micro extra two, gives 2 yrs, also you don't have to launch straight away. What are your thoughts.
Old post but suits my purpose, I'm thinking of using Micro extra two this season, in 2014 I applied Gell shield 200, 6 coats,then used Crusier Uno EU, most now gone, could I do a rub down and apply the micron extra two, or do I need a primer first. I did find a web site which gives you what to use depending on the area you sail in, it listed Crusier uni as the one to use or tiger extra from Hempel, Chatham same as Thames area. Using the micro extra two, gives 2 yrs, also you don't have to launch straight away. What are your thoughts.
