In complete contradiction to what my esteemed brother counsel just advised if you're new to the gig, do not disassemble anything. If you're paranoid, you can tape off various bits.
I'm something of a nerf luddite. Every time I take a gun apart to paint it, it never goes back together quite right. And according to certain widely vaunted members of our community, the Roughcut 2x4 runs on "dark sorcery,"--I wouldn't take that apart if you paid me.
Then again, after the light base coat of black I also paint everything by hand with acrylics from Michael's or A.C. Moore, so I just... don't gum up the works.
All the really classy people take their guns apart. I just know my limitations and work within them. It was rather aggravating when I had to field strip my barrel break due to a misaligned slide. Using nothing but a swiss army knife. In the middle of a survival horror larp. Twice.
Seriously...