I use my own variant of Ed's Red which uses some John Deere Hy-Gard Low-Viscosity Transmission/Hydraulic Oil, LC-20 and a bit of Lucas Synthetic Oil Stabilizer (LSOS is from my pre-BITOG days!), along with MEK, kerosene, Stoddard Solvent, and toluene. The first three are the "car" items of course. The LSOS will not go into solution unless the MEK is added.
Needless to say, I don't get this stuff anywhere near my polymer-frame SIG's!
It works well for me.