Maybe u could try a light scouring pad. When my dep pipe got rusty which is a bare metal finnish unlike your fmf. I got on it with a fine sand paper & resurfaced the bare metal it came up like brand new. Then I sprayed the pipe with a high temp clear coat to provide a seal.
SOS pads, the ones with the soap in em.
A close second is steel wool, a decently fine grit.
3rd is Scotch Brite pads. If it's heavier rust it tears the pads up pretty quickly.
This is what I have found anyway when trying to clean rust off pipes, car wheels, and bicycle frames. I used to live in Michigan and I played with all my toys all winter long.
SOS pads, the ones with the soap in em.
A close second is steel wool, a decently fine grit.
3rd is Scotch Brite pads. If it's heavier rust it tears the pads up pretty quickly.
This is what I have found anyway when trying to clean rust off pipes, car wheels, and bicycle frames. I used to live in Michigan and I played with all my toys all winter long.
Thanks for all the tips. I went ahead and used some steel wool and some wd40 on the pipe and it came out pretty good. I think I will give the Mothers chrome polish a try later on.