Don't get Puzzled/confused brother ....:)...Your conclusion regarding the paint issue seems to be right.......This chemical or bleach thing dried on the paint resulting in blistering .....
Ok....I remember an other victim which is going to prove your point further....Again A BMW....I feel that Paint on these BMW cars is quite sensitive to withstand extreme conditions.....
The story goes like this.....
we handed over this Triumph Herald To Ustaad Zahid ....mmmm...I feel 5/6 days before Eid...After a day or two I also went there to see ,what is going on.....Found a BMW 2008 model 5 series (525 i) almost brand new scratch less in white colour was standing there and apparently it was being polished by painters.....something very normal...So we just had some conversation regarding our project .....
when Coming back to my car ,i just passed That white BMW with Light yellow patches all over the body ....specially on boot ,bonet and roof ...At first sight ,I felt that some light effect...but when saw closely...they were yellow patches ....Painters were trying to remove them with rubbing compound ....but those patches were deep down the base and would not go with rubbing compound .....In this attempt ,they removed paint from some creases .....On inquiry came to know that owners were abroad and the car was parked under cover (not roof ) receiving rain and sun .....The colour of that cover (very fine quality) bled and absorbed in the paint deep and permanently....ruining the beauty.....
It does not make sense.....but I am an eye witness....
a band new BMW worth at least 5 million....damaged ...only solution ....respray....
So I think these cars are "OVER SENSITIVE".....:D...to face some unfavourable circumstances.....:o....
RESULTS....
Please keep your BMW away from SUN AND RAIN UNDER COVER......:$.....
Allow me to imbed a "SHAIR" here....trying to resist but a strong urge to write....
BAQAUL SHAAIR.....
"NAZUKI US KAY LUB KI KYA KAHYE...
PANKHARI IK GULAAB KI SI HAI ".............Same applies to these BMWs.....:-#