I did the inside of my 40 and I think it turned out great. Been about a year and no fading or peeling. I just used a wire brush attachment for my dewalt and went to town on the old paint and rust.
I did not use the rollers at all, instead I poured some in a pint paint can held it and then stuck an air gun in the can and started spraying. Took about 30 min to do the insides. Used almost the entire gallon and it looks great. DO NOT GET THIS STUFF ON YOU!!! It took paint thinnner/gas and a lot of rubbing to get this stuff off my hands and arms. Good luck!
I did not use the rollers at all, instead I poured some in a pint paint can held it and then stuck an air gun in the can and started spraying. Took about 30 min to do the insides. Used almost the entire gallon and it looks great. DO NOT GET THIS STUFF ON YOU!!! It took paint thinnner/gas and a lot of rubbing to get this stuff off my hands and arms. Good luck!