I just painted my racks a month ago with bedliner in a can. I disassembled all the parts, sanded them down, cleaned them and they seem to be holding up rather well. I also did my sidesteps the weekend after and they are holding up very well too. No signs of chipping or scratching. The color turned out to be in between flat and matte black when dryed.
Here's a pic. email me if you want a bigger one to get a closer view.
[img] [img]http://img253.echo.cx/img253/4083/p40500146mq.th.jpg[/img] [/IMG]