I read some time ago ,to put laquer thinner on a rag and wipe it in a small section . If it's a true epoxy primer , it will not come off onto the rag.
I tried this on my own epoxy primed part , and it did not show on my rag.
Do a google search on the subject and see what you find.

Tim


1951 3100 Chevrolet
1951 Chevrolet Suburban Carryall
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