Originally Posted by Trbo323
Hour? Day? Week?
Hours to a day depending on how nasty the metal is and if the black oxide is still on it. Sometimes the coating doesn't want to come off and sometimes the scratches are deeper than they seem. Little nooks and crannys can be a PITA too. If you only have a few hours at a time to work on something it can stretch out for weeks to the point you're sick of even looking at it.
In my experience anyway.
One of the reasons I've developed an appreciation for beat up guns.