This may sound silly, but I apply glue to the (well sanded) edges before painting. I rub it in with my finger so I just get a very thin film on the edges. Similar to treating end grain prior to final glue up.
I would think that sanding sealer would work for the faces of the letters. That, or thinned poly or spray lacquer. Just to be safe, use water based products all the way through the process.
I would think that sanding sealer would work for the faces of the letters. That, or thinned poly or spray lacquer. Just to be safe, use water based products all the way through the process.
