previous threads were:
Sanded all three pieces (off the bike) with 400-grit paper first, then Duplicolor sandable fill-in primer did wonders, even on the two spots I had some damage from a tip-over, followed that with 340-grit sandpaper, then three coats of Duplicolor "metal flakes" silver paint (three cans was perfect, but I am a beginner--more skilled may have been able to accomplish this with less).
Wet-sanded that with 1000-grit to smooth the over-spray (I had a couple areas that were rough to the touch and therefore weren't as reflective). Went over the whole thing with rubbing compound, then polishing compound, then cleaned it with solvent to remove any remaining dust/etc.
Two light coats and one "wet" coat of Duplicolor spray clear top coat (I know, would have been better to go with an air compressor, etc, but I didn't have all that). Again, very LIGHTLY gone over with wet sand 1000 grit, just used the polishing compound this time, and WOW did it come out nice for a guy who has to re-read the directions on shampoo or screw up the "shampoo, rinse, repeat" directions...
As far as it holding up, before the clear coat, I did a little riding and got two tiny (quarter milimeter at best) rock dings, wouldn't notice them if I wasn't working on the pieces. I imagine the clear will add a layer of protection there. With the clearcoat, it's at least as strong/hard as any other automotive paint, I suppose.
I stopped by the local sign shop and bought a piece of laminate and put it on the bottom of the chin spoiler only as that is the area that gets beat up most...am thinking about popping for a "paint protection kit" or checking the local tint shop to see what it would cost to have the chin spoiler and front-facing surfaces of the two other lowers prepped, just for grins.
"Who was that man on that shiny steed?" "Hi-yo silverrrrrr awayyyyyyyyyy!"
(sorry, too much time in the sun)