I have used Much-Off for 11 years on all my bikes. My previous bike was a GS TC 2010. I sold it last year with 20,000 miles on it. I rode it every day and washed it every week with Muc-Off. The bike looked Showroom fresh and the first person to view it bought it for my full asking price.
I have spent my life savings on a 2017 GS Rallye and I dare to use Muc-Off on it too. It is 10 months old with 6,000 miles on it and is cleaner than when I collected it from the showroom.
I dilute my Muc-Off 50/50 not because I'm afraid of it but because it still works perfectly well at this dilution and therefore cost half the money.
We are all entitled to our opinions so here is mine....... Those that have had issues with 'aggressive cleaners' may have failed to read the instructions and as a learned Tosser has mention gone for a said wank and left it on too long.
I wash my bikes in sections, rinsing off as I go. My black bits stay black and my shiny bits still are.
My top tip (for those who are interested) is to use Turtle Wax 'Wax it Wet' as you dry off the bike with a micro fibre cloth. It can be used on black plastic, frames, engine etc and leaves a great polished finish.
A picture paints a thousand words so here are a couple of the 'for sale photos' of my Muc-Off drenched, 7 year old daily commuter with 20,000 on the clock....