You'll want to get the line bore checked to see if it in fact needs it. In terms of cleaning, you can't have it tanked like a cast iron block. You'll either need to have it steam cleaned or, pressure wash it with a good detergent, getting into all the nooks & crannies. This goes for all Aluminum (Type4) and Magnesium (Type1 & Type3) cases. Hagner in Collingswood I *think* cleans AL & Mag parts.
You should have a good look at the crank yourself, checking for nicks and gouges. Minor scratches can be polished out, while deeper grooves etc will require cutting of the crank. It boils down to how much cash you want to spend. Realistically, if you inspect the bearings and there is no indication of a spun rod or main bearing & the crank journals look good, you can just clean it up, install fresh bearings and continue with the rebuild.
Personally, I would not use anyone local. Send it out to CA if you need the crank machined or case machined. I can recommend a great guy for Chevy, Ford, Pontiac, Buick etc, but don't know anyone local that does good VW work (and neither does a few of my VW racer buddies...they all send them out to CA)
-Brady