Thanks for the advice. I've picked up 2 scotch brite pads at Ace (the regular green, store didn't have the red), so I'll try those. The primer is already dried and has to cure for 7 days but I'm following the Dupli-Color instructions, practically exactly and not mixing paints. I'll learn as I go.
UDS-ified ECB, UDS, mini-WSM (almost done)