I had my yellow tank painted black a couple of weeks ago. The previous owner had spray painted it black to match the plastics using rattle cans, which obviously looked a mess as most of it peeled off. I stripped of the black and was going to epoxy the outside before taking it for two-pack painting as I was concerned about the tank being porous. When I took the tank to the paint shop to discuss this, the chap told me not to worry about epoxy as he would spray a sealer and then use the car bumper type paint.
I have the tank back now and have a smooth finish, it looks good although I am still concerned about the paint lifting from underneath. I haven’t used the bike much since its return but for the time being I drain the tank after use just to be safe.
Regards,
Mark