I have been speaking to a dial restoration specialist about this dial and another small HAC clock I have with a scruffy dial. You can only re-silver a dial if the base metal is brass. She said she has given up on 20th century dials of this type as they never look very good when restored. Let that be a warning to you if you ever plan to buy one of these clocks with a scruffy dial, if you cant get a replacement it will always look scruffy 
I am going to try to buy some different aluminium and silver paints and see what I can do, the bit I am dreading most is applying the new transfers.
