$1000 depends on how much bodywork needs to be done. I personally think it is high and more in the $600 range but not much less for a really good job. More than that is a stretch.
Painting over chrome. Won't stick no matter what you use. Either blast or strip it first and start from there. Might look good, but it WILL come off.
Powder coating will stick to the chrome after blasting just fine. Powder coating needs to be put onto a metal surface that is smooth. Any bondo or filler will melt or gas out when you stick it in the oven. Liquid metal can be used as a filler but it is a pita and needs to be baked to work right.
You should phosphate coat the finished metal prior to powder coating for best results.
Powder coating is very difficult to touch up. It is basically like a plastic that melts and flows to cover the metal. Not exactly, but the same principle.
Powder coating is thick unlike paint that might be a few thousandth thick. Powder coating can be 10-20 thousandths thick and mating parts wil be affected. Plan accordingly.
Powder coating is pretty immune to fluids like gas and oils, unlike paints.
I'd say use it on brackets, frame,hubs,fork lowers, side covers,and little misc parts and paint the rest. Bengal silver is a good match for the Honda parts.
We powder coated a complete CA95 including the frame, fenders, and tank and it came out spectacular. It was a LOT of work!!!!!!!!!!!!
www.2wheelconnection.com if you want to see the silver color. under current projects.