Take a look at the links Lane posted.
Those types of trailers normally clean up easily. A medium foam pad should be all you need. You will need a fair amount of pads depending on trailer size. If you have Rupes pads yellow will probably be the one to use. As usual, a test spot will be your...
OP, have you ever tried removing carpet from the car and pressure washing it to clean it instead of repeatedly extracting the carpet? Or just put in new carpet...
looking forward to some reviews of these polishers,
one would think it was SEMA with all these releases! Always something happening in the detailing industry!