[Smudger]

Posh - from experience g101 is the best out of Tfr virosol ubik etc... All  These chemicals are all similar some are made better than others, some sellers dilute the product before re selling ( not just magica ) so in that respect you've been had as your paying top dollar for g101 with added water

Richard - never had a problem with 101 we use at  1 part 101 to 5 parts water  (20% strength) staining is more likely when used at strong or neat levels.  All the guys have been trained on using 101 in all wether conditions and temperatures, I have also found that wetting the surface first gives better overall results

Darran