[NOTE: I'll be updating this post as I complete the build. This is sort of a draft version at the moment. You'll see what I'm getting at as you read on.]
This forum seems to be semi-abandoned, but I figured I would document this process for posterity's sake if nothing...
My ACR came in Monday, so I broke it down and tried some new colors with a camo pattern I do using Graphite Black, Icon Grey, and Sig Dark Grey. Micro Slick on the BCG, Bolt, Charging Handle Carrier, and guide rails. Going to engrave it and chop the barrel down to 12.5 this week.