Orange-Go

[fox46]

^^ Powdered soap is a good call too. I have often used dry laundry detergent and it works quite well. Just put some in your hand, add a little water to turn it to a paste.

[MrBasse]

Lava bar soap with pumice is great. They are a dollar a bar and last a rediculous long time. Plus the bar is nice to be able to use the pumice to work at tough spots that won't come clean. When I taught automotive and foundry that was all we used.