pretty much the same.. you just "set" the emblem semi deeply into it... your not looking to totally fill the empty areas.. just for it to grab the surface edge and surrounding area...
fiberglass magnets......
ba-dump-bump




how would you get the lumber out once installed....
I'd do a dual padded hook deal in the back.... couple 1/4" plate, plasma cut hooks with a hole at the top for the cable.... than pad em with pipe foam and tape..