Working with Acryl-R
I will take the easy question: for the Acryl-R applicator, I just leave it in the can. A year after my last use, I can pick it up and use it again. At some point it may freeze up, and then I will get another applicator.
The hard question - how to remove Acryl-R. I have not found a way. I have replaced side marker lights and sealed with Acryl-R, and gotten some smudges where I don't want them. I wiped with a rag, and left what remained. I did not try goo-gone or anything, as I didn't want to see if it affected the clear coat.