I am going to repaint several old signs and need some tips. I tried desperately to get them to buy a new sign, but they won't go for it. The old paint is oxidized and has some mold ( the wood has rot too) - the sign has raised wood letters on a plywood background. There's no hose or water access at the location, so I can't power wash it. My biggest question is WHAT TYPE OF PAINTS & PRIMER would be best? I'd like to stick with latex if possible. If it was just some lettering I'd get ONE SHOT, but the signs are 4x8's. I'd like to spray the the whole thing with a primer, then spray color on the wood letters and come back and paint the background with a small roller & brush. The colors - BRIGHT RED background, TAN & CREAM for the lettering. Please take a peek at the attachment and let me know what you think, thank you!