I am looking to paint the sanded hotcoat of an entire board with acrylic paint, apply a rice paper logo over the acrylic, then gloss coat. I will be applying the paint with a paint brush. I’m using polyester resin. I understand that painting the foam directly using an airbrush is the preferred method, but thats not the method I’m using.
At some point I’ve read comments to a post that answer these questions, but they were buried in the archives and I can’t find them anymore.
The Nova Color paint I ordered just arrived today, and I’ll slightly water it down as recommended in the archives. Do I need to sand the dried acrylic paint before applying the gloss coat?
Whats the best method to apply the logo over the acrylic paint? Can I tack it down with lam resin, wait until gel, then gloss over? if so, do I want the the lam resin to cover the logo, or just in between logo and the painted layer?
I’m thinking your rice paper won’t stay put without some glass over it - should be sandwiched in the lam or covered with a patch of glass on the lam/cheater coat.
And probably adhesion problems with your gloss over brushed on paint over the whole board, let alone getting it perfectly flat for glossing
look at is this way... whats the worst that could happen!
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quite a bit. It can be done, and I have seen some great jobs with this done by some well known board manufacturers in shops and stuff...however much can go wrong. your entire gloss coat can peel, and in my opinion it is a matter of time before this happens. the smallest ding or dent will initiate your board's downfall, and it will spread like wildfire. resin bonds to resin better. what type of board is it? if you don't mind the extra weight you could do a pigmented resin coat over the whole board, sand and then gloss. I hope this helps you
Put the lam/logo down on the sanded hotcoat with a layer (or two) of four ounce. Hotcoat and sand the lam/logo, Tape off the lam/logo. Spray paint the sanded board. Instead of glossing, spray a clear finish coat that is compatable with your paint and consider it done. Brushing the paint on is a big mistake. Use some kind of roller. You will most likly get some bleeding along your tape if you brush or roll. Spray with Habor Freight cup gun is the best cheap way to go. A good tape off and a couple of coats will give coverage without bleed. Wouldn't hurt to very lighty sand the paint with wet and dry 600 or 1000. Next time save some money and shipping; Just buy cheap interior flat acrylic at HD or Loews. What's your reason for painting on the hotcoat instead of doing like most folks and painting the foam before you laminate? Screw something up?
Here are some tips first you can use acrylics to seal the Logo in place. Prep the board to at least a 200 grit sandpaper Brushing a solid color coat would be a mistake. Acrylic paint dries fast and you will have a lot of over laps tine spots. If you use a roller use one that is made for applying resins a thin foam roller again be careful of lap fine Best to thin your paint with water and clear acrylic extended then spray. There are some good acrylics made for the auto industry they should hold up better then what you will fine in a Hobby store.
Another Idea i have given some thought to for doing large areas of solid color is using a marine mono urethane paint paint. They are made to apply over fiberglass surfaces flow beautifully with brush or roller They will hold up better then acrylics plus They have a high gloss finish.
From everyones feedback I decided not to paint the entire board with acrylic and not to place a logo over acrylic. I have a resin tint that didn’t come out well and was hopng to just cover with paint. I will try an opaque tint in the hotcoat instead.
So what to do with this acrylic paint I’ve got? Should it only be used for pinlines? It seems people are using acrylic paint to cover up larger areas. Example: http://www.surfboardsbymicheljunod.com/boards/twotone.html - …not sure how the light brown couldn’t be acrylic applied on the hot coat.
i would address you by your name but i'd feel like I was insulting you...
That is not acrylic, it is the method I described. make it a very opaque mixture of pigmented resin(not tint). a thin layer brushed on, then sanded then glossed. It can be tricky, and you do not want a thick color coat. this might help you further...