I have noticed that everyone mounts the trunions on their blanks then sand blasts them and then paints/finish them.
So my question is if the inner part of the blank under the trunions, is not "painted" won't that cause issues down the line with rust, corosion, etc.
Here is a pic form 7.62 X 39 after he demilled a krink. 6th picture down. There is rust after a few years this would cause problems don't you think?