Actually, this is a fairly collectible pin. Has a disappearing pop bumper, only 1 of 2 games with that feature (see IPDB link for details).

http://www.ipdb.org/search.pl?any=sea+wolf&search=Search+Database&searchtype=quick#2088

Recently completed a restoration of this game. New back glass was available and installed. Cabinet was in nice condition and needed only a few touch ups. Playfield was in good condition, needed minor touch ups, then was clear coated. Metal parts were polished or nickel plated. Oak woodwork was stripped, stained, then protected with satin polyurethane. Legs were sanded then repainted red. A few new parts installed from Pinball Resource. Game now looks and plays great.

May still have some documents. Send me your email and I'll contact you directly.
Steve

Playfield doesn't look too bad, definitely restorable with some effort. All the plastics seem to be there. Inner components can be cleaned up, or new ones like coils and plungers can be ordered from PBR. You should consider removing all the components from the playfield in order to give it a thorough cleaning, then you can determine how much touch up is needed (don't use Novus or other wax if you are going to clear coat the playfield later). The disappearing pop bumper mechanism is a bit complicated so be sure to take a lot of pictures if you completely disassemble it (and don't loose the small round spacers! ).

If this is your first EM project, I would suggest first starting with the components in the lower cabinet. Be sure to mark all the 'home' positions on the steppers before you disassemble them for cleaning (looks like they are marked in red from one of the photos). I'll get back to you if I locate any documents.
Steve