I polished my A5 with the SOS Method and LOVE the results. I actually did this about a month ago; however, just stumbled on this thread. lol
I spent probably a good 45 minutes on EACH half. And I put a lotta muscle into it.
I would recommend using an SOS or Brillo pad as oppose to just steel wool. Just for the fact that the SOS and Brillo have a soap in them that aides in the lubrication of the polishing (scrubbing). It'll just make things a hair easier for ya.
One that that I didn't notice being mentioned, that I will, is REMOVE THE CYCLONE AIR LINE! lol I could see serious problems arising if you manage to get soap down in the air line. lol It's as simple as turning a screw, guys. lol
As for the WD-40 . . . Do as Monitor said. Spray it ON the PAPER TOWEL. Not onto your gun. Easier to control what is getting hit with it this way. Give it a good scrub w/ the WD-40 and I recommend going back over it again with a dry paper towel to get any excess off.
As far as oiling it again . . . Any gun oil should work. I'm a big fan of Hoppes. And, DEFINATELY run it through your air line w/ a couple dry fires. It'll better distribute the oils where they NEED to be.
I really dont think it's possible to ruin your reciever doing this. If you do, you're a moron. lol And, if you do manage to somehow mess it up, dont fret. You can replace one or both halves of the receiver on www.tippmannparts.com for like $30 (old shiny A5) or $50 (duracoat A5).
I included a before and after shot of my A5 as well.
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