Looking to finally fix up my dads car (hasn't been washed in years, never paint corrected, needs some love), Have access to RO so no problem there. Looking at starting off with Sonax Profiline Fine Abrasive 5/4 with Lake Country Orange Light Cutting Pad then after cleaning it all up with Sonax Profiline Nano Polish 3/6 on Lake Country White Polishing Pad. or safer to just go with single Sonax Perfect Finish 4/6 step? or combo of 4/6 to start and finish it off with 3/6? I should be pretty safe with this combo?