I have some Fuchs muck off type remover, and wasn't over impressed to be honest,
And came across this Browsing through halfords earlier " Care car" Truck film remover concentrate, 5litre which you dilate at 5% which makes approx 250liters for £13 , with my halfords trade card down to £11.48...
Will give this a go and keep you posted.....
Never really used TFR before but if it's similar to what the trade use its good stuff???