You need a variable speed polisher NOT an angle grinder. I suggest you go talk to your local body shop and talk with them. NO bleach. Too fast and Ryan is right you will burn paint or melt decals. Get an old hood or something and practice first before you tackle your rig.
Speed and pressure are your friends and enemies, not enough and you will be there forever, too much and you have a big mess.
Glen & Robyn (A.K.A. Puff & Crickit) Full Timers..
2006 F350 6.0 with 3.73 gears, 4X4, Extra-Cab Long Box, Oil/Tranny/P.S. Coolers. Coolant filter. SCT Livewire.
2011 Cedar Creek 36RE, Auto levelers + too much to list..!