One of the descriptions of this product on a site that sells it....
Autosmart G101 is professional strength multi-purpose cleaner that is unbeatable for intensive cleaning of neglected wheel arches, engine bays and undercarriage areas. However, the high strength of the solution must not be taken lightly, and care should always be taken to select the correct dilution strength for the task in hand, and to avoid letting it dry out fully before it is rinsed off, otherwise permanent stains may appear on treated surfaces. In short, as long as it is used with a degree of care and at the recommended dilution ratios, Autosmart G101 is an excellent value for money intensive cleaning product, and one that we happily recommend to experienced enthusiasts and professionals alike.
This is a professional strength product and as such carries potentially serious health and usage risks that should be fully understood from the outset - please read the instructions carefully.
Please also note that due to shipping regulations concerning Dangerous Goods, we can only ship this product within the UK at the current time. Orders received for international destinations will be cancelled and refunded in full. Our apologies for any inconvenience.
It maybe points to magica not being this although what you say seems convincing to me. I think/ hope we who bought magica would have been told of the dangers by the seller if it was this as we could have caused some stains/ damage to upvc if used neat, as was encouraged. The colour of magica and foaming effect is a common one in many tfr's
One I found is this
http://www.clickcleaning.co.uk/products/685/diamondbrite-grimebuster-(foaming-tfr).aspxInteresting though what you say and I look forward to seeing your findings.