It is truly a great all-purpose cleaning product. My main interest was to use TKO for cleaning the 27 year old carpets and interior in my airplane. Mixed as directed for general purpose cleaning, the product worked perfectly. It even removed a stain caused by spilled hydraulic fluid and ground-in dirt that has resisted every attempt at cleaning so far, including steam cleaning. The fresh orange scent was a nice touch, too.
I was particularly pleased that TKO would so easily remove exhaust-gas stains from the engine cowling and belly panels of the plane. Aviation fuel exhaust stains (and the inevitable mist of oil discharged by the engine breather) are tough to remove. The exhaust stains in particular almost become part of the paint as they are baked on by the high temperature of the exhaust stream.
We normally remove them with raw aviation fuel, a messy, environmentally damaging process that, while effective at removing the stains, also removes the skin from your hands and the wax from the aircraft. We have also had some success with "Simple Green", however it must be used full strength and at that concentration, damages the paint finish as badly as aviation fuel. TKO mixed in an extra-strong (but still economical) 4:1 solution made this a simple "spray-on, wipe-off" process. The paint finish was shiny and streak-free. Amazing!
The 4:1 mix works as a great degreaser, too, with none of the harmful personal and environmental effects of petroleum-based solvents. I test cleaned some particularly dirty landing gear parts; with a short soak and a light brushing the parts were clean and oil-free. Once they dried, I was able to apply primer and paint with no further cleaning...
B. D. - Vancouver, British Columbia