As an amateur, I use the same 1.3 tip gun for solid SS and epoxy. This has worked fine so far. I clean it after each use with lacquer thinner or aerosol spray gun cleaner. This time I fully disassembled it for cleaning and found a very thin layer of black epoxy residue on all internal surfaces. Is this normal between full cleanings and/or detrimental to performance? I'm guessing I'd have to use a more potent solvent to get it out.
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