Any tips or recommended solutions/soaks for surface rust on chrome parts?

Cheers

Coca cola and tin (aluminium) foil.

Ali is softer than chrome so it doesn't scratch. Ali also attract the ions from the iron oxide due to differences in charge, apparently,and the sugar and citric acid in the coke work as a fine, soft abrasive and acid.

Its a long job though. Alternatively, soak rusty things in oxalic acid is what all the old school bmx restorers recommend.

Autosol is great for some polishing, but some think it's too harsh on chrome, better for aluminium. People tend for polishing to recommend soemthingcalled "peek", available on the interweb.

Autosol is better on chrome, it's too abrasive for aluminium hence it leaves thousands of tiny scratches on it.

might be cheaper / easier to replace them. Local bolt / screw specialists probably only charge a few pence per bolt

smurf

I've never seen surface rust as anything more than a cosmetic issue.

Clean it if you want but you wont die

Change them for some nice A2 or A4 stainless steel bolts

Any kind of spray oil – WD, GT85 etc and a scouring pad or wire wool. Chrome is hard as, no worries about scratching it.

As above. Change them for stainless.
If its M5 or M6 for example, even Halfords stock them for the price of a bottle of coke 😉