I got a couple of doors back due to KA+ peeling after 2 years. Doors were sticky and had streaks on them. Cleaned with acetone, sanded, cleaned again.
Thought I did a good job....
Found out the gunk was hand soap. The doors are directly below soap dispensers. I choose the wrong cleaning solvent, 50/50 mix of water and DNA did the job.
I wiped the wet Surfacer and reshot right away, I wanted a better look at what the product was doing.