Could anyone suggest a good foaming traffic film remover. To clean vehicle using cold pressure washer (Alto 30CA compact to 150bar IIRC), sponge & bucket or neat/ low dilution with weedkiller sprayer for particularly grimy areas.
What do the foaming pressure washers at filling stations like BP use?
Also is there a lathering agent one could add oneself?
Looking for 5l minimum size, preferably or 50l or 25l drum.