Hey Vid - I'm almost finished restoring this Agents 777 playfield, but have just run into a ghosting insert problem.
I don't spray clear myself but have a pro finisher up the road do it for me in his booth. He's been droppering in clear around any low spots or indentations around the inserts, adding a bit more as needed between coats. I was working down a slightly heavily built up spot, when it kind of went milky on me. Maybe it wasn't fully cured (was applied ~24 hours ago); now I can press on it and see the air under it move around.
I've been using the clear finish that NAPA carries; I'm operaring under the assumption that the average clear that is not the old Diamondplate will be less hot and will make for a decent repair, following your "slice and inject" method, but I thought I'd check with you ahead of time. Making things a bit trickier is that fact that this ghosting isn't restricted to the insert itself, the blister is somewhat amorphous. Looks like, for whatever reason, the drops didn't bond well with what was underneath (it was sanded with 400 grit). Was it just the heat from me trying to sand it down, possibly before it was fully cured?
Didn't see this problem coming, but it wouldn't be a restoration of I didn't have to endure at least one nail-biter...