gelcoating over old gelcoat?

[RKrough]

I have enough gelcoat let over to re-do the topsides of my 19'. I was going to buy paint.
Can Gelcoat be "rolled and tipped" like paint? Can I thin it an spray it though a gravity feed gun like paint?

 

[jerseysportfisher]

I have enough gelcoat let over to re-do the topsides of my 19'. I was going to buy paint.
Can Gelcoat be "rolled and tipped" like paint? Can I thin it an spray it though a gravity feed gun like paint?

Rolled sanded then buffed, or sprayed, personally i don't like thinning gelcoat, change the nozzle in the spray gun to 4.5MM - 6MM and adjust the air accordingly. Make sure your lines are clean and have a real good water separator. Be quick with the gun, sags can happen quick

 

[31jcptown]

Topsides

I just finished doing my top side by roller 2 coats first with 3/8 nap sanded and the 3/16 and sanded looks great will take som pics and post here a re a few of the inside of the house I did same way

 

[RKrough]

That looks damn good from where I'm sitting, The largest spray tip for my gun is 2.3mm so there is no way in hell I can spray this stuff without thinning it 20% or more.

I rolled a little on the transom. I'll see what it looks in the morning.

Thanks

 

[MDI45]

You will have to wet sand

 

[jerseysportfisher]

That looks damn good from where I'm sitting, The largest spray tip for my gun is 2.3mm so there is no way in hell I can spray this stuff without thinning it 20% or more.

I rolled a little on the transom. I'll see what it looks in the morning.

Thanks

roll, sand, buff. We just did that on my buddies donzi, looks like factory gelcaot. he didn't want to spray.

 

[harpoon83]

what grit paper would you use for final product?

 

[jerseysportfisher]

if you never done it before, 1500 - 2000, get a flexible longboard so you dont put finger digs in it. Not a home depot block . the higher the grit, less chance for you to fuck it up but the longer it will take. Then buff it with a good wheel and gelcoat polish.

 

[CEShawn]

I agree with going overboard on the grit level. Years ago I had easy access to 1500-2000 but not this year. So this year I tried just going to 600 grit then the 3M Rubbing compound which is, about 1200 or so. Really didn't do as good... still smooth and looks good but not the nice polished when I went above...

 

[RKrough]

Thanks for all the tips! I wet sanded and buffed out a small area on the transom that I coated last night with a roller. It looks good.

 

[MDI45]

Thanks for all the tips! I wet sanded and buffed out a small area on the transom that I coated last night with a roller. It looks good.[/QUOTE RKrough,wet sanding takes time ...but it comes out great