Not wasting anymore time on your foolishness.
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Not exactly the same, but I apply epoxy to the top of the pickguards I make and it holds up really well. Of course, epoxy is tough to work with if you don't have experience.
I may be mistaken
but I was under the impression he took existing art and epoxy it to the face of the pickguard
not epoxy over painted on art
paint or draw on a separate medium (Paper, canvas, etc)
then "glue" it on the face
Kramersteen used to do this with t-shirt graphics
add a layer of glue over the top of a guitar
stretch the fabric over the top
Spray clear until its level
Correct - I would take the artwork and place on the pickguard and then cover in epoxy. The issue would be whether or not the epoxy interacts with the paint. The epoxy layer is about 1/4" thick. It avoids the time in putting 20 coats of spray lacquer.
Maybe the thing to do, then, would be to have the artist create their work on some kind of paper - not directly on the pickguard itself - and then either send it to Dali or try to recreate his process. Not to volunteer anyone, but this could avoid any pitfalls. Additionally, if the work is created on paper, then it can be scanned and copies made, in case there are issues getting it to adhere to the pickguard.