Thanks to all those who responded to my original post requesting advice and expressed an interest in this 1961 VW (with 36 k on it) which had been left in a shed since 1970. Here's the first set of followup pics after we washed it!
Here's before:
http://i21.photobucket.com/albums/b271/HRP/PackardsFeb2005013.jpg
Here's after the wash with diluted Purple Stuff (it didn't clean the license plate):
http://i21.photobucket.com/albums/b271/HRP/21July003.jpg
http://i21.photobucket.com/albums/b271/HRP/21July004.jpg
The mechanicals are being repaired and/or replaced now.
Here's before:
http://i21.photobucket.com/albums/b271/HRP/PackardsFeb2005013.jpg
Here's after the wash with diluted Purple Stuff (it didn't clean the license plate):
http://i21.photobucket.com/albums/b271/HRP/21July003.jpg
http://i21.photobucket.com/albums/b271/HRP/21July004.jpg
The mechanicals are being repaired and/or replaced now.