Not a dedicated prewash foam. You can use MultiX and maybe TRIX as a pretreatment with just spraying them on. Maybe MultiX would work in the foamcannon or foam gun but it's very expensive option. Even if it's concentrated you use much more product when you foam. But say a regualar pump pressure spray bottle and MultiX in 1:20-1:30. And apply a thin layer of it and let it dwell and rinsing it off.
This is Sonax version of the TRIX that we have here in Sweden. Applyied from bottom and up up to the door handle. So it's both a tar remover and iron remover in the same bottle. They both get less aggressive when you have them both. Then I foamed on the a 50/50 of Bilt Hamber Surfex HD and the BH Auto-Foam. And adjusted it on the chemical mix setting on the foamcannon. So I didn't rinsed off the Sonax Intensive Degreaser and foamed right over it. After dwelling a long time this is what a pass or 2 gets with a Kärcher K7 electric PW.
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This has not been washed since mid november. There where places where it had some road film left. I did take too long time with aggitate lightly with a brush around cracks and crevices and emblems and such. On the second picture you see how much of the aggitations do around the door handle. But also this loosens the dirt so it's able to be clean rinsing it off. As you can see in the first picture I start at the bottom and work my way up. This I do with every pretreatment that I do and when contact wash I do as usually start at the top and work my way down. Now when I let it dwell too long and even if it didn't dry. The dirt re-attached to the paint again and I did get way less off from the hood and the roof when I came to them. But the Tac System Mystic Bubble which is very simualar to Reset car soap did get it off cleanly when I contact washed it. Usually I see very little of dirt in the rinse bucket. Which I have just for I'm interested to see how effective my prewash where. This time it failed a little LOL. But not any extremly dirty rinse water. I think that the prewashes I do have reduced the wash marring to very little. When I polished the hood and the roof in early december. The clay bar didn't picked up hardly any contaminants and a finishing polish step on the roof made them go away. And the last time it where polished where 2 1/2 years ago. Much of the finer swirls comes from removing ice and snow on the paint. We have a law that nothing build up of ice or snow can be on the vehicals. This is on my Kia cee'd SW with a silver metallic paint which is on the softer side of hardness of the clearcoat. The car I washed today in the pictures is my stepfathers Ford Focus I maintain when I'm able to. This needs to be compounded and polished badly. But looks okay on a distance LOL.
This is after the washing and the LSP where totaly failed. It got dark after I was done with applying Sonax Spray and Seal on it. So no LSP on this first picture and after Sonax Spray and Seal on the roof
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Which coating do you have on the cars?
/ Tony
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