Emerald urethane has a very soft finish. I did a test
[email protected] SW, painted a board in factory white, let it cure for a month, I placed a book on the board, and the book pulled either the paint or the cover. I sent the formula to 3m for a super adhesive, but it was turned down. LOL. As far as Aura, all I can say is when you try to match an alkyd, & the paint surface dries, is very soft and takes a several days for a full cure. This is an age old problem with cross linked latex-alkyds. Breakthrough has new urethane technology. We have a painted piece of tin foil to demonstrate the flexibility and adhesion strength. Go with the V50 or V 70 series full cure in a day. To touch, half an hour. Or water Based lacquers are also strong and hard enough to pass the book test. Damm spellcheck.
While @ SW, 10 years ago we had a variety of products for a kitchen repaint specialist Called "California Products" out of Boston. The applicator used an automotive clear coat for his countertop hardness. Like my butcher says, can't make chicken salad out of chicken plop to be polite.