Mother's liquid polish and their small power ball (on a drill) work pretty good. This is a cheaper option but I don't think it has the "long term" sealing options that Zoops is supposed to have. I have a zoops kit that I have been meaning to use but can never seem to find the time to do it.
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Chris
1968 Camaro SS
LS3/T56
Full of DSE and Holley parts
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