I do some powder coating at work
We normaly charge around $150-170 for 4 rims (unless they are 22's or 24's then its $200)
powder coating when done right will hold up way better then paint
over the past couple years I have done an experiment I powder coated my front bumper and 2 years later it still looks as good as new this desert sun will fade paint faster then anywhere else and the powder coat looks as shiny as it did when I first did it
now for the rest of my experiment
last year I painted my rock rails with krylon using a metal etch primer and a sanding primer then krylon white
the rails started to rust within a year We dont get much rust out here its rusting from washing the jeep once a month and they started to chip real bad and the paint was rubbing off from getting in and out of the jeep
the paint was real brittle more brittle then if a body shop did it
the front tube fenders I powder coated then white then painted them to match so far its holding up better then expected there are no chips from running down dirt roads and look as good as new when washed
the rear quarters I painted like we would at the body shop (or any body shop would)
they chip real easy but besides the rock chips it looks good
I recently took my sliders off sand blasted them then powder coated then white and today I was painting a chrysler car that was the same color as my jeep so I shot them at the same time
in my opinion the powder coated panels are holding up the best
just make sure who ever powder coats those rims for you knows what they are doing or it wont hold up