Ken, looks like good advice. How about cleaning up the edges with a belt sander? Would that work? Then finish the corners with a file? Thanks for the advice about the stress cracks and hacksaw.
On the 3M adhesive, we cannot find 99 on 3M''s web site, but 90 is designated as a counter top adhesive by 3M--is that what you meant? We will be spraying near varnished surfaces--would the MEK take off the varnish? (we have had some challenges with acetone taking off varnish....).
Sounds like 90 is the right spray adhesive for all permanent applications where you want to use a spray, rather than the 77, right?