You could get it soda blasted? They have a mobile thingo that comes to you, or probably would be cheaper to go to them.
I think soda blasting is less intrusive than sand blasting, and i'm sure you could figure out how to block up all the holes.
I know this mad guy with a crappadore wagon that would probably help you out lol
I think soda blasting is less intrusive than sand blasting, and i'm sure you could figure out how to block up all the holes.
I know this mad guy with a crappadore wagon that would probably help you out lol