I hand wetsand. I choose the starting grit depending on how deep I want to go. E.g. the top of heater box had deep scratches so started w/220. But the sides I just used 3000 & 5000. I tried using a rotary sander to speed up the process, that didn’t work for me. Been using Mother’s plastic polish on most of the smooth plastics. Did end up using some Meguires 17 on the heater box, Mothers wasn’t glossing up. I’m sure a better plastic polish exists, I haven’t researched that yet, just using what FLAPS stocks.
Bigtime key on the liquid polish step is using a soft cloth. Optics cloth seems to work good. I need to find a bulk roll of it, been using goggle & sunglass pouches. Tried a high dollar terry micro fiber towel last night, damn thing added visable scratches. I’d choose soft cotton over that POS anyday
Obviously I didn’t sand the textured defrost vents. Experimented and used rhino shine on them. Also rhino shine on the dash pad and steering pad. It has dye in it. Supposed to be used for weathered rhino liner.