I tried the painted helmet thing for a while. It never clicked with me. This winter I ordered a Multicam MICH cover from Tactical Tailor. When it came I just dismounted all the accessories, installed the cover and used my knife tip to poke hole where the various bolts needed to penetrate. I then mounted the accessories back up and went to work. No real drama, the cover fits snugly everywhere it should, and the whole package is now more functional.
I am a believer in the utility of covers.