Ok, I've got an old Nel-spot 007 pump pistol I want to restore. This gun was my dad's, it was my first exposure to paintball, the first marker I ever shot, and I feel it needs to be brought back to full force. It has some body rust, but 85% of the finish is still intact. The barrel is in a bit of a problem though, as some old school paint residue sat in there for about 7 years, so it caused alot of oxidation. Also, the mainspring is pretty corroded as well, so I'd like to see about replacing it, if anyone knows where to find one. Otherwise, any general tips would be helpfull.