Comment on Custom Tutorial Part 3- Paint by CustomAnon
How does the surface feel? Would you recommend putting some protective layers on top of the paint?
You can use sealant. I have no problem with the painted surface except sometimes in yellow ponies or white ponies, who feel chalky. I used modgepodge on my earlier customs (Lyra, Derpy) and it holds up really well, but it dents easy and can leave brush strokes. Testors dullcote is another decent sealant for ponies.