I used the brass brush 100 times and it scratched the paint on one side:
It rusted a little from not completely drying it last night.
The gasket remover cost another $14 and the brass-wire brush made the running total $51.
I used the gasket remover before running to Dollar Tree for Crazy Mom and brushed each part 50 times, but one corner needed particular attention, and I brushed it at an angle 10 times before realizing I scratched the metal!
People say that scratches that go around the mating surface create texture that improve the seal from gasket maker, but going across the surface creates potential leaks.
I can see some scratches that, while they are at a bit of an angle, go from the inside corner to the outside.
Everyone said the missing paint didn't matter and someone said light scratches didn't matter, either, but I ordered sanding sponges, bringing the running total up to $64.