The chemistry at this sink is not very good... It does not take even ordinary dirt, the foam pressure is often very weak, in order to properly apply foam to the sedan, you need to apply foam twice! There is little time for rinsing! One plus is that there is an air compressor. If you need to wash the body quickly and there are no other options, then this sink is fine, but if an alternative with normal chemistry opened nearby, I would stop washing at all!