Okay here goes........I work at an automotive shop so I have this readily available but....
First I put all the parts into our parts cleaner bin, with the fluid that cleans transmission valve bodys etc...and let them sit for 2 days or so fully submerged. This breaks up and lossens the thick stuff.
Then I put eveything in our steam cleaner/parts washer/high pressure tank thingy for about 30 minutes, this gets pretty much EVERYTHING off, then i put 'em back into the cleaner solution again just for kicks for 1 more day.
The last step is to take out the parts, spray with brake clean to get off the cleaner solution (very acidic, won't go away without brake clean), then blow dry with the air gun, then I re-coat everything with this rust inhibitor spray we use (any kind of rust free, rusty bolt loosener spray should work). Then i wrap up/put in plastic bags, then in cardboard and store away for later use!
When it comes time to using them, all you need to do is wash off with brake clean, no thick goo and cosmoline to worry about anymore!
Thats just me, but it works PERFECTLY everytime...
