I have read bits and pieces of this in different books over the years.
It was an excellent post.
I guess the question is how much of a sandblast beating would it take to see with naked eye?
Kinda like all solvent base products will have some shrinkage but I guess the trick is keep it small enough so you cannot see it?
Of course I'm one of those wackos that sand blast everything but do it very carefully and a lot of times stop at the factory primer or try to.
Even though risky have in the past cleaned up hard to reach spots on fiberglass and will on the vette I'm working on now but know its risky and requires a lot concentration and very low air pressure.
Once again that was a wealth of information!