Really not sure what to use to get rid of the rust, got some steel wool though? Would appreciate some advice, cheers.

Threads? Get it chased through.

Thanks for the reply yup, would my lbs be able to do it?

Wire brush and elbow grease to shift the worst of the rust. Then get LBS to case and face it. Should cost around £10 – £20.

Yup, get it done by a shop with a proper tool. They cost a lot £2-900, and your unlikely to find those taps outside of the bike industry.

I once lent my BB chaser tool to a mate who supposedly knew what was doing, demolished him frame by using the non drive tool in the drive side, despite the fact they have it written on them which is which (and its very hard work to drive the tool the wrong way). Thankfully the tool survived.

Then refit with loads of quality grease, and empty your frame out after every properly wet ride. Proper anti-seize is what you want, not hub grease, I’ve used waterproof marine grease before on a commuter bike and the BB came out of it very easily 2-3 winters later.

or you could soak it in oxylic acid.