I use a mirror and a flash light with a flexible tip to look inside at the ceiling of the gas tank which is a common area to start to rust.
For my customers, I recommend ReNu gas tank repair or installing a new reproduction gas tank.
Even though I've read of DIYers success with POR-15, I won't use it because I can't guarantee it.
The ReNu process has a lifetime warranty.
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Eric Hi Performance Automotive Service (formerly OVO or Old Volvos Only) Torrance, CA 90502 hiperformanceautoservice.com or oldvolvosonly.com
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