All good info. Thanks for the help! Not sure I can eyeball it, though. Not enough experience, especially since it doesn't seem to look the same wet as it does dry.

@RichJohnson, thanks for the history of OD. That helps with future projects that will roll into the Korean War. Do you know if the Marines used the same OD on their tanks from WWII into Vietnam? I assume they did at least through WWII and the Korean War...probably even into Vietnam. Seems like they got their tanks from the Army, usually cast-offs, through the '80s and '90s. (still today, probably)