Sincere thanks for the prompt reply and helpul tip. After 5 minutes of massaging with a 70% isopropyl soaked micro fiber towel noted no difference. Repeated again for a few minutes, then scraped with my fingernail. Was able to dig away at it. Like to try again with the plastic razor blades...
Have read thru all the adhesive posts without finding a solution. My black BMW is kept in heated storage. Discovered a roof leak has dissolved construction adhesive or perhaps a sealant, dripped and hardened onto the car. Quarter panel build up is about .02" thick. Floor accumulation is so...