I want to find out what everybody recommends when duracoating a barreled action. Do you paint it assembled or do you paint it separated barrel, action, recoil lug. Should I mask the crown? Should I mask the interior of the action? Should I paint the bolt? What about the recoil lug? Or will doing so ruin the tolerances of my rifle? I want to duracoat it but do not want to affect the performance.