I used a cheap jewelry cleaner and some simple green-water mix (1:4) and ran it for about 30 min. The black primer is still on but all the paint was gone, even in the recesses of the sheet metal roofs on a novgorod that tend to be quite stubborn. If you tend to strip minis often, I would totally recommend the investment. Mine was ~$30. Plus it keeps the lady's jewelry clean and thus the lady happy, a super bonus.
