My 74 Dart (The Bondo Bucket)

sireland67 said
Soak the pistons in mineral spirits for a week or so, blow the loose crap off with brake clean.
Then use one of these tools to clean the ring grooves.

Lisle 24000 Lisle Ring Groove Cleaners | Summit Racing

but that's $24.99 plus the cost of the mineral spirits plus the week or so. my way does the same job for free and now, so no waiting :thumbsup:
did i mention for 'free'? :lol:
neil.