I had a problem with a polymer enriched sealant after final polish with AP-300. It left splotches everywhere. I contacted the manufacturer and they said I had to wipe the entire trailer down with mineral spirits to get rid of any trace of prior polish. I was then to put the sealant down and wipe it off before it dried. I don't know if others had to do this with their sealant or not?
'01 2500hd ext. cab, 8.1 litre gas, 5 sp. Allison auto
3.73 rear end
Mag-Hytec rear diff cover
Amsoil Dual by-pass oil filtration system
Amsoil synthetics all around
265 watt AM Solar, Inc. system