We have a problem with our latest painted kitchen in that the solid wood soft maple panels of the doors has an obvious line showing up were the panels are glued together. We outsource our doors and get them polished sanded so this has not been a problem before, but we have just hired a new finisher and I'm wondering if the finish is to thick or to thin. We do not see the same problem on the inside of the door only the face side.
From contributor A:
Contact your manufacturer. Ask him what type of glue he used to fabricate the doors. It sounds like typical glue creep which leads to "print through/telegraphing." We only use Titebond 1 yellow type glue for painted interior work - it does not creep.
If youíre using nitrocellulose lacquer, you cannot allow the joint to stay wet for more than a minute or two. Once itís primed, the first topcoat needs to be thinned super thin and sprayed in the thinnest possible coat you can spray (high pressure, low volume). Once you get a small coat on, you can gradually increase the solids until you get good coverage, but the piece will need to be sprayed in super-thin coats, every coat. With nitrocellulose lacquer, each coat re-melts all previous coats. If wet long enough, and the moisture can leach back into the glue on your final coats, re-raising it, even though you eliminated the flaw in the priming stage. This is tough to do if you live in a hot humid area, because super thinned out coats full of fast dry lacquer thinner can blush easily.