I live in Jacksonville and have no issues with the stainless Ricks tank. The car is garaged most of the time. I do clean it with stainless cleaner usually once a year. No corrosion issues since 2014.
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Chris
1968 Camaro SS
LS3/T56
Full of DSE and Holley parts
I run a stainless tank, exhaust, and a bunch of accessories. My favorite way to renew stainless is simply using maroon scotchbrite. Wipe in straight lines.