I am not sure whether Aurofix is made on the basis of shellac (or a similar varnish). As we do not produce this product ourselves, I can inquire with the producer if required.
I would try our crepe eraser: https://schmedt.com/crepe-eraser-glue-eraser-to-remove-adhesive-residues/45070001
Unfortuntely, we do not have anything more specialised such as the traditional gold rubber.
Best regards,
Constantin Schmedt