Great input!
I'd get the Castrol if it was in a larger shop, not sure on the ventelation but good to know for outdoor/circulated uses. My guess is it wont leave a nasty oily residue. The Purple Stuff sounds like it'd be a little more user friendly, while the Berrymans sounds almost like an engine degreaser. Berrymans makes a mean injector/fuel cleaner! Im going this weekend and I'll pick up whatever I can find to "experiment".
We have "Do it" centers similar to Ace, I'll make my rounds through there and the Napa down the road and see what I can find. Sounds like theres many options just a matter of going out and trying a few.
Most of the oil is caked on from normal use, She'll probably get a good oiling afterward.
Thanks!