Wait a minute, what PSI your pressure washer is that it can strip a car paint? I never had a car that the paint work would fail using a 1k PSI pressure washer available at most retailers. Currently, I have the portable one with 350 PSI which is enough in most cases to do weekly wash, however, if an AR paint easily peels using 1k P.W. it's a big bummer.
I never said the pressure washer caused anything directly, rather that it expanded the problem. There was already a big chip in the paint on another one of my cars (not Alfa) and like the OP's car, it expanded. In my case, it was during washing if the chip got hit at certain angles with the pressure washer. Something like this would only happen on the edge of panels or where the clear coat is already thin.
I did not say it was your statement, but this is not the first time I read someone was posting about a pressure washer and paint striping on this forum. A decade ago, when the manufacturers switched to eco-friendly or water-based paint, I never had an incident where the paint around a chip area would get damaged using a pressure washer using up to 1K or a bit above PSI. However, if it's possible that you can strip the AR paint using a $1k+ P.W., it would be the first car I own with a paint job like this. The AR is actually the first car I own that had an overspray in certain areas of the car, such as the roof, the gas lid cover, and the rear door pillar. I used a claybar to remove it.To my surprise, other owners here had reported the same issue in those particular spots. So it is very believable that the paint job on AR is bubbling in certain areas and then can get damaged by just using a regular P.W.
