I assume they have actually failed the car and given you an MOT failure form. If not then get them to MOT it and fail it as you will need the failure form.
Rust on discs is NOT repeat NOT a reason for MOT failure. The only way your discs can fail an MOT is by cracking, corrosion or wear sufficient to weaken the disc structure or inadequate brake performance as measured on on either a Tapley decelerometer or the roller brake.
Therefore suggest you go back to the testing garage and ask them if they would like to reconsider before you lodge an appeal with VOSA. If they maintain their position, ask for an appeal form VT17 and note the address for appeal as displayed in the garage's reception with names of their VOSA certified testers. You will need to complete the form and send it off with payment to the appropriate VOSA centre who will then make arrangements to carry out another MOT at the same garage but using VOSA's own staff. If the appeal is upheld as it will be (based on your explanation) the 2nd test fee will be refunded, you will get your new cert signed by the VOSA tecnician and the garage will receive a b*ll*cking. If they were stupid enough to have failed all 4 discs for rust, they will almost certainly lose their MOT licence.
In writing the above I have assumed you have actually failed the MOT although I suspect they may have tried to do a pre-MOT which is not appellable.
hope this helps
< Message edited by Nigelo -- 14/12/2011 18:30:45 >
You can lead a horse to water but you cannot force it to drink