Tango... I don't know for certain, but a week with an acid in the system could eat a good portion of the block away... I used a weak citric acid solution to clean up a rusted pipe threader head that got left out in the rain... I left it in a bucket for two days... not much left of the thing after that...

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!