Snow foam with a hand sprayer?
Discussion
I think a strong citrus mix would be better although won't dwell for as long.
Do you not have a hose to be able to apply it using something like a Gilmour Foam Master:
https://www.motorgeek.co.uk/products/gilmour-foama...
Do you not have a hose to be able to apply it using something like a Gilmour Foam Master:
https://www.motorgeek.co.uk/products/gilmour-foama...
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