[Simonb]

Need advice as it's a new line for me following gum removal we are also undertaking rotary scrub cleaning.  Using a yanmar 3600d and a 450mm cold water rotary scrubber.
Its mainly paved areas ie slabs concrete hardstands ets. The main offender is dark lichen spores etc.
Many thanks

[Smudger]

Best way to remove gum is hot (steam) hire or buy a hot box or hot pressure washer

Lichen - after cleaning treat with hypo this will remove everything organic

Darran