Is it ok to spray paint with acrylic paint before aplying hotcoat? As I see it coloured hot coat is not the way to go to get uniform color.
I would not recommend it… even if it is water based(for sure not rattlecan). I tried waterbased acrylic over a lam one time to fix a F up and it peeled months later. not worth it. Try a colored hotcoat. I have done those with success. make sure not to sand through and a colored gloss will cover any sandthroughs that may occur. strain resin.
Do it!
Ive done this many times and never had an issue with de-lams. The technique I’ve found works best is to apply a ‘cheater’ layer of resin on top of the lam to the area you want to paint. Then sand this area flat before you spray to remove the texture of the cloth. This will allow you to keep the paint thin and the finish smooth. Then hot coat and sand as normal. Be carefull not to sand too low tho. The paint creates a relative high spot and if you go too low when you’re sanding you coud hit the paint and leave an ugly scar in your beautifull artwork! I have used this technique to create pin-lines, paterns and full blown original artwork and as I said have never had an issue.
Good luck!
wouldnt it be easier to just spray the foam ?
or do a cutlap ?
It is gree xps board with american oak veneer on top. I thought that that oak color and green xps color will look good together so i laminated the board and used clear resin. It does look ok but id like diferent hue of green so im thinking of pigmenting the hot coat or spray painting before hotcoat on bottom of the board and the rails.
You are intending to spray the lamination...that's a no bueno.
Finish the board first. make it solid. Then when you are done hot coating, sanding etc...then you spray the color you want, and give it a 2 pack urethane high gloss finish, or gloss coat. you can treat it like a layer between the hot coat and gloss / 2 pack.
The trick is not the sand through the gloss coat.
Painting the weave will puddle up in the weave giving you tiny high and low spots, the resin will melt and blend with the paint and you will never, never...ever get a good bonded surface.
I've painted hoat coats, then put another hot coat over that before, but you really have to kick the second hot coat good. If you don't and let the resin sit on the paint too long, it will melt and blend into the paint, and you will just have a gooy mess to clean up. You have to kick the resin so it doesn't sit wet on the paint any longer longer than 5-8 minutes...maybe 10 max.