I know Roger Koh uses quite alot of cleaning agents but I don't believe that most are required for alot of the UK market I would recommend for Xmas that you ask Santa for a training day at LTT it's worth the money ....but only if you've been good.
Shaun
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Nasty ballpoint-ink stains, tenacious blue-jeans dye-transfer stains or greasy and oily stains build-up that fills the valley of pastel colored leathers will be problems of the past.
This thicker than honey pH 7.7 strong prep cleaner does it all for removing all foreign contamination to the topcoat.

I just simply agitate and spread this thick “honey gel” and stretch it as thin as possible for an even coverage.
It will not streak as it is as sticky as honey.
And I can let it work as long as I like even leaving it for one or two days sometimes with even better result on those nasty ballpoint ink.

Step 2 is to spray a pH 3.8 leather-safe all purpose cleaner and extract.

What do you think is Step 3?
Roger Koh
Leather Doctor®