If only surface rust use Brillo pad or those soapy steel wool pads with water to clean it off. I've used it many, many times on classic cars and motorcycles, it doesn't scratch the chrome.
Here's my check list I took off the Gov.UK website:-
1. The test doesn’t cover:-
Condition of the engine, clutch, gearbox.
Tested in the MOT:-
1. Lights.
Condition.
That they work properly.
That they are secure.
That the headlamp(s) are the correct colour.
Rear lights, indicators and reflectors.
Headlamp(s) checked to see if the aim is correct.
2. Steering and suspension.
Condition.
That forks, handlebars, grips mountings, head bearings, swinging arm, shock absorbers and damping effect etc are secure and work properly.
3. Wheels and tyres.
Condition.
That they’re secure.
Size and type.
Correct fitment.
Tread depth.
Valve condition.
4. Frame.
That it’s free from cracks, damage or distortion.
For corrosion which is likely to affect the steering or braking.
5. Braking.
Condition.
Operation and performance (the braking efficiency test).
Brake controls.
6. Exhaust system.
That it’s secure, complete & not too noisy.
7. Fuel system.
Leaks and security of components.
8. Seats.
For the presence of a rider’s seat and that any seat is attached securely.
9. Wheel alignment.
Correct alignment of front and rear wheels.
10. Sidecars (when fitted).
For secure attachment & alignment.
Suspension.
Wheel bearings.
Wheel alignment.
Lights and tyres.
11. Horn.
That it works properly and suitable for the vehicle.
12. Registration plates, vehicle identification and frame numbers.
That they’re present and legible.
13. Drive chain and sprocket.
That the chain isn’t too loose, tight or worn.
That the sprockets aren’t too worn.
That a chain guard is secure.
14. Throttle.
That it works properly.
15. Clutch lever.
That it isn’t so bent, damaged or shortened that it can’t easily be used.
16. Footrests.
That they are present and fitted securely.