Originally Posted by Lizer
No I'm saying that what makes sense to me is there is only physical bond when a cured finish is sanded. I'm also saying that I don't know if there actually is any chemical bond at any point, unless more coats are added to a finish not completely cured so it is still susceptible to (dissolved by) the solvents in the newly added coats.
The chemistry and science of paint finishes fascinates me, and when I work on my car, I really try to apply the science I know with the art and skills I try to learn here and elsewhere. I just wish I knew more about the actual chemistry. What I'm saying in the above paragraph are just musings...educated guesses maybe, but don't accept them as the truth. I'm not a chemist.
Ok, I understand what you are saying, and I agree, IF the film is fully cured. IF the film is a 2k that is fully cured, no chemical bond, but if it isn't fully cured or if it's a 1K there is a bond, correct?