You can use the same materials and procedures for polishing your tanks that you would use on your trailer. My experience was that the tanks will arrive out of the box with many gouges and blemishes and you will have to address these before beginning to polish. I used a scotch bright pad on an air die grinder to smooth the major scratches and welds prior to beginning to polish. Then, just proceed as you would normally, with a rotary buffer and nuvite and work your way through the grades of polish and finish up with nuvite S and the cyclo.
1964 Overlander/2000 f250 Crew Cab 4X4 PS WBCCI# 5600