I actually won this BLACKFIRE CLAY CLEANER AND EXTENDER in the last contest (thanks guys!). I had forgotten to stash it in my truck so the last few times I clayed I did not have it with me. I finally remembered and got a chance to use it yesterday. Of course I had forgotten the camera so no pics...sorry (the 70's were very hard on my memory)
Job was an 05 Audi S4, pretty decent shape but needed to be clayed. I used Blackfire PolyClay. The product is basically like a liquid soap. Directions are to spray the dirty clay bar, then massage it in your hands as though you were lathering a bar of soap. Then rinse. Of course when it gets dirty fold and expose new clay as needed. My thoughts:
It does work, however do not expect a miracle product. I found it took off some of the grime, but not all. Seemed to work better at the more "spread out" stuff, like tar and bug residue. The more gritty the stuff, the less it removed. This makes sense because the spread stuff is on the surface and not embedded. I don't think anything would pull the gritty stuff out besides picking out that piece of clay. You do have to "work" the cleaner pretty good to get results.
So, it does work and as it's name implies, it extended the life of the clay. It is an extra step and definitely added time to the job because each time it was dirty, you have to stop, soap, scrub, rinse.
WARNING - the soaping part can be dangerous!! Imagine that clay between your soapy hands while your lathering it. It's very slippery and wants to squirt out of your hands and hit the floor! We all dread that mid-air moment when our precious clay falls victim to gravity and this will definitely increase those chances. After the first time "rinsing" at hose tap I changed technique and I filled a 5 gallon bucket with water and drug it around the car with me. When I had to clean the clay I did it over the bucket so if it did drop, it went into the water. This also was easier than going to the tap to rinse after each pass.
Overall it seemed like a good product and I have plenty left in the bottle so more experience may yield better/different results.