Where do you get the paint?
any paint shop that specializes in automotive paint. i usually get dupont paint. all you do is give them your color code, and they'll pull it up on their computer...about 10 minutes later, you'll have a fresh can of OEM paint.
What do you use to clean the paint out of the gun?
what we do is we fill the gun with thinner (not too much), shake it so you can get rid of the paint on the sides of the can, then shoot it out of the gun to clean out the tubing. you'll probably have to do this a couple times to make sure the gun is completely clean. then you can get a towel and just wipe off the excess stuff.
How much paint do you need sand before you paint ( is it just the clear coat?)
just sand until its a bit rough, but not too rough. i'm assuming you are going to primer the kit before you paint right? so sand with some 400 grit, primer, then sand the primer with more 400 grit until its smooth. make sure you clean the kit COMPLETELY of all dust, particles etc etc...
How do you actually use the rubbing compound??
you use it like you would wax...rub on, and rub pretty hard until the shine starts to show, then wipe off the compound. don't use too much though because it does eat your clear coat.
any more questions?