Quoted from edednedy:I'm with Stoomer. Once you've stripped everything off of the top of a playfield to thoroughly clean it, you're most of the way there. Might as well shoot it with a few coats of acrylic lacquer, especially if you've done any touch up.
I use Rust-Oleum Specialty Clear Gloss Lacquer Spray. 4 bucks a can.
Can you post some pics of the process using the lacquer, before and after?