If I may, I may be getting in over my head here, but here goes.
The late John Goldsmith owned Research Products, and manufactured Spitfire, Spitfire Advanced, etc; cleaning products, and also sold the Dry Fusion system.
I am led to believe that he 'borrowed' the idea from a German company, that was using a machine similar to his, (for roof cleaning?), and adapted it to carpet cleaning/protection.
The 'neutra fresh', you mention, I have never heard of.
I have been using Spitfire Advanced for the last three years or so, buying it in 206litre, (44 gallon) drums.
I reckon it's pretty grouse stuff.

Cheers,
Shorty.
