Hi autopians, I recently bought a 3M all in one Wax, but my question is if I should or shouldn´t wash my car again an then apply a final coat of P21S.
I don't rewash, but I do a 91% IPA wipedown of each panel before I begin waxing, alcohol in a spray bottle and wipe clean with an MF. This removes any residual polish and oils/fillers. The wax bonds really well with the wipedown and on average I get another month or two of durability with my collinites. Other waxes you might get another couple weeks maybe 3.