RE: Covering A Painted surface
I agree with dean,a very nice finish on the p40 les it looks very natural.We use indasa paper here in commercial quantities and it's a good sandpaper favoured more for it's price than any real advantage over 3m etc.
Dean you may just want to put a thin coat of 'primer sealer' over the sanded finish (i'd sand back to the original primer) then sand with a medium sponge sanding pad and go from there.You can get chrome paint from ALSA.COM