Normal to wash twice for various reasons.

Snow foam soak and rinse removes larger dirt particles which could cause scratches if straight to wash stage. You leave to dwell so that the water snow foam has time to lift the dirt.

Most go straight to wash stage here, but would suggest going for a pre wash here. Something not too soapy and certainly nothing with a wax or polish in!!! as this will do nothing more but seal in dirt.

Then wash, because you have removed most of the particles by soaking or pre wahing, you can afford to go a bit more aggressive with a harder cloth or sponge.


Basically you wash more than once to remove particles that could scratch the paint whilst you clean with wash mit or other