I've only built one of the Alfas so didn't have this problem.
I agree with the others but if you don't have any luck with the various polishes try the forum on Brady Ward's site at
http://www.scaleautoworks.com
someone on there is bound to know about this problem.
Alternatively Dave Cox at
http://www.modelmotorcars.com
I don't know his email off hand but it is shown on that site home page
Dave knows about everything there is to know about Pocher.
Good luck
Martin
http://www.freewebs.com/martsmodels/