It can be difficult removing rust, on top of that, it can be very time consuming! A few weeks back Evapo-rust was recommended in the comment section of a video by Peter Moore. I ordered a litre of the stuff to test and was absolutely blown away by the effectiveness of it. Normally rust removal is difficult and time consuming, but with Evapo-rust, you simply put the rusty component in the liquid and leave it a few hours.