I think a trigger scale would be great. Would have to find a scale sensitive enough..
If it can make readings when pulling along a horizontal metal surface, I think that would be best.
Anyway.. the rust protection is the 'main' test, it's simple and I think it will turn out with a relegable result.
List is now
-ww2 US oil (yours truly)
-norwegian military oil (yours truly)
-Hoppe's (yours truly)
-Various non gun oils (yours truly)
-(DCCUK's mixture?)
-US CLP (Crotalus)
-Militech1 (Crotalus)
-Hoppies gun oil (chris)
-Break free LP (chris)
-Rem oil (chris)
-Rig +p grease (chris)
-Brownells stainless slick (chris)
I'm still hoping for a couple of more brands
..will make contact on PM later on.