Hi Charles - I hadn't seen this thread earlier...
I carry an after run oil that will not cause any damage to the silicone ramping putty. It also is available with a syringe applicator and instructions that make it easy to add after running without taking out the glow plug or removing the airfilter element and exposing your engine's internals to dirt at the track. A larger refill size is available also.
GMK Supply "Afterlife" after run oil
Some of the other products mentioned are OK to use as an ARO in engines that don't have a silicone ramped crank, but they don't play nicely with the silicone over time. My oil and these cranks get along just fine, and it is also easy on the glow plugs, as well as supplying superior protection against rust.
Available at many fine RC retailers including A Main, Carolinas RC, Nitrohouse, RC Compound, SMF Store, Bluegrass Hobbies, Tilted RC, Full Throttle, GS Hobbies, Mod Hobby and others, including dealers in Europe.