Just got a Cannondale SC800 frame for free.... The thing is this bike has been destroyed by someone jumping on it! I will post pics. on request, did not due to graphic content. however the group on it is Shimano 600EX (RD 6400), Mavic aero bar (bull horn) Campagnolo Omega Strada Hardox rims and Mavic Hubs.
I wonder if there is any way I can clean the most of the rust of the Shimano group? Everything works fine, the rims are true and fine. So I would love some tips on how to clean the group up, Thanks.