Hmm, I have worked with it a few times to paint lighting instruments but I've never had it wipe off, I usually get good adhesion. Was the metal clean and dry and non-polished. I could see it scratching off a polished stainless cart if it wasn't at least sanded first. Could it just be dust from overspray?
Primary #1+Auxiliary: Burning River Pale Ale clone
Primary #2: empty
Primary #3: EdWorts Apfelwein #4
Conditioning/Drinking:Brewers Best Belgian Tripel, Apfelwein #3, EdWorts Apfelwein #2, Cranapple Wine, Routers Share Network Closet Strong Scotch Ale, McCormack's Old Malt Oatmeal Stout