Gasoline should not be used where it'll contact skin on a regular basis. A mineral spirit based solvent like Varsol or hardware store mineral spirits paint thinner is better but you should still use solvent resistant Nitrile gloves when using it for things like cleaning chains. NO Petrochemical (gasoline, Varsol, mineral spirits, oils, greases, etc, etc) are good for your skin or internal organs over the long haul. Try to minimize contact with them by using gloves or barrier creams.

Getting back to the SG issue. The reason I don't use SG for cleaning is both because I need to get rid of it and also that it needs to be rinsed off the parts so that there is no long term rusting due to the residue. Once I hit something like a chain with a hose to rinse it then I need to spray it with something like WD40 to displace the water and then I need to oil it. That's adding a lot of steps and products. I'd rather just wash the chain using mineral spirits and my chain cleaning gizmo and pour the dirty solvent into a pickle jar to settle so I can reuse it something like 8 to 10 times over until it won't settle to a clear liquid on top of the grunge. Only then do I need to take it to a recycling depot for paints and solvents. That's pretty good life for a solvent compared to using SG in a one shot sort of deal and then rinsing and then WD40 and THEN oil.

At least I think so.