On unusual surfaces like a gast tank and a cylinder. I use bumper stripper. Its a spray on paint stripper but it acts as a foam and it fills in the nooks and crannies and it sticks to all the dips and such, got my gas tank very clean now time to clean the inside :evil:
Rides
200es Big Red "Ol Bessy"- Hondaline front rack
2005 Honda 650 Rincon 27 inch ITP Muds with 14 inch C Series Wheel, one inch Bigfoot lift kit, 2500 Warn Winch, 60 Inch Moose Plow, Hondaline Front and Rear Camo Utility Bags, K and N Filter
1999 Chevy silverado V8, K and N, fiberglass bed cap, mossy oak accents, hypertech computer tuner.