Everyone loves to pre-wash their vehicle with snow foam. Apple iFoam by DodoJuice is a top quality snow foam to work with. Used with a foam lance it will produce a thick foam that will stick for longer time on surfaces reacting with dirt. Cleaning agents will dissolve road grime removing most possible dirt when washed out.
Removing dirt prior to contact wash will minimize the risk inflicting new scratches to your vehicle's paintwork.
For sure iFoam is a product you will love using alongside with your foam lance and the most importand of all it will not affect the performance of existing protection such as a wax.