Quoted from vid1900:Let your decals dry overnight and you are ready for clear coat.
Two-part auto clear is "hot", meaning that it has very active solvents that will melt your fragile decals if you are not careful.
If this is your first time spraying clear, practice on some decal scrap stuck to a beer can or piece of sheet metal. Get the feel for how much clear melts the decals on some scrap rather than your precious playfield. When I say melt, I mean destroyed; the effect is not subtle.
Spray your first coat as dry as you can. Almost dust over the decals.
Ten minutes latter, give another very, very light coat.
Ten minutes after that, you can finally give a normal, light coat of clear.
Now your decals are protected. You can make any other last minute painting touchups you found, or go ahead and finish clear coating the playfield.
Vid, After applying a water slide decal I sprayed it with a clear gloss acrylic to protect it from melting from the final clear coat. Seemed to work ok. Is this technique ok!