Rust is like cancer, it needs to be removed completely to stop the spread. I would sand/soda/glass/etc. blast the rust off, prime the area and cover with an appropriate paint. You can pick up an air blast gun for as little as $15 at Harbor Freight.
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Jon & Chris Everton
1986 40' Dog House #86
0 hp 8V92 Allison HT740
Soon to be 500hp ISM with ZF 6 Speed
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