Not without removing the tank. But ... I have used Apple Cider Vinegar to clean the inside of a tank. It does a pretty decent job.
To remove a stripped, I have used these from O'Reilly's with great success. I purchased both sets, which covers 8-18mm or 10-16mm. Don't remember which. Can be used on standard sizes as well.
Ride smart! Ride often!
To remove a stripped, I have used these from O'Reilly's with great success. I purchased both sets, which covers 8-18mm or 10-16mm. Don't remember which. Can be used on standard sizes as well.

Ride smart! Ride often!