This might not be in the right topic.
When I made biodiesel at one stage I had leftover material called glycerol (?). This is handy for degreasing driveways, killing weeds, etc. It can also be used to clean grease off your hands and leaves your hands in better condition than using normal degreaser, detergents, etc. The trouble is that I am running low on it.
I have since realised that Inox is also good for getting the grease off your hands rather effectively. Just a light spray on the hands and rub them together then wipe off with a rag.. then a simple wash with soap. It's fairly convenient being in a spray can and it's non-toxic. I also use it for getting grease off car parts while working on engines (depending on how seriously thick and embedded the grease is).
Just thought I'd pass this on as it might be useful info for someone!