How did this happen? Were you cleaning sap off, if so you likely just smeared around the sap; get some real automotive sap remover and try again. Its also possible the acetone ate through the clear coat down to the base paint, you may need a body shop to fix it. I'd find a good body shop to look at it.
Acetone cannot be left on paint for more than a few seconds. I know people use it to clean something, but then you must clean off the acetone right away, or bad things happen.I was fixing a paint chip and used some nail polish remover to remove excess paint from the paint pen…
If you are not experienced in car care do not use rubbing compound on a new RAV4. It is too easy for beginners to rub right through the clear coat and color coat into the primer. I would never use rubbing compound on a clear coated car like the RAV anyways. You will make an unsightly mess because in certain light conditions you will see a haze of scratches in the area. Take the RAV a good detailer for advice and to fix it. The RAV cost you good money to purchase. You already screwed it up by your inexperience. Don't make the damage worse. The dealer will probably want his body shop to repaint the entire fender.
Good News, Definitely stick with proper products. I've used wrong products myself and had bad consequences; live and learn.I'd say. The compound says its designed not to affect clear coat and I didn't notice it had. Buffed it up with some wax and looks as good as new.