This isn't my idea actually. Found it on another car forum when searching for bumper plugs and just thought I'd pass it along
The guys on that other forum were painting them successfully by first roughing them up with 220 grit sandpaper. Not sure how well it would hold up long term, though. I just wanted something temporary until I decide what to do with both front and rear bumper covers. Both are a little rough and I'm still debating whether to respray or go with a body kit, then respray. Either way, I'll be filling the holes eventually
Anyone with a black or white car could save a few bucks and shipping time easily by picking up some of these. I'm sure that plugs from bumperplugs.com would be a more sensible solution for most.