It will either be double sided tape or a strong glue. My chrome guy suggested something like what they use to glue on quarter panels now days?
I tried the double sided tape on my old f100 emblems on an old set of spear like emblems. I just put 2 small ones on it (in the center of the seat for the f-100 emblem) but I think a guy could put 2 long ones top and bottom. I had pull and wiggle it back and forth to get it back off. I think the double sided tape would work fine I just don't know about what kind of life span it would have though.
The glue could be messy and hard to deal with in a future fix or replacement situation.
Well everyone I just paid for the finished 3 sets of F-100 emblems on Friday. They should be in the mail system I think and on their way to me as we speak. I can't wait to see them and also show everyone!!!!