I filled two up with FK425 (100% and 50% dilution) and I decided to get a little weird on the third one. The bottles are 16.9oz size, so I filled it with about 10-12oz of water. I was originally going to dilute FK425 to about 25% for clay lube, but I figured since it was my last bottle I'd try something goofy, considering I don't have any product like this. I wanted to go with a dwelling pre-wash approach, aimed specifically at the rear fenders considering they accumulate the most filth, especially in the winter.
I wound up mixing in the bottle...(approximately)
10.9oz filtered water
5oz of Chemical Guys Citrus Wash and Gloss
1oz of Optimum No Rinse
It came out to a pretty basic green color with some decent clinging ability as you would normally find in a liquid/gel mixture. I sprayed it on the size of the sink and it slid down pretty slowly, leaving a nice slime trail behind it that I was looking for. My plan for this will be to spray the mixture a couple inches above the mass of the filth so it leaves a nice coverage all the way down and loosen up the grime. I can always spray more above the mixture as I go to slide down if it didn't reach the bottom.
Sooner or later I'll do a little before and after test using the mixture, which I'll be calling Diluted Optimum Chemical Guys Citrus No Rinse Wash and Gloss (I'm up for new name suggestions). Hopefully it would be a nice alternative to a more expensive pre wash such as P21S Total Auto Wash.
I figure...
At the best rate, CWG costs 18.95(without shipping) containing 128oz of product.
So that's ~ $0.15 an oz.
At the best rate, ONR costs about 39.99(without shipping) containing 128oz of product.
So that's ~ $0.31 an oz.
At my size bottle, I used approximately 5oz CWG costing ~ $0.75 and 1oz ONR costing ~$0.31. In total ,and if you really just feel like throwing $0.25 in for distilled water, the total cost of the product comes to... $1.31 per 16.9oz of product, equating to about $0.08 per oz of product after all dilution. Noticing that they both have citrus cleaning agents...
Now, you have P21S Total Auto Wash in bulk for 62.99 at 169.1oz(5L), equating to ~$0.37oz.
So, per 16.9oz size at best bulk rate for each product....
TAW costs $6.25
DOCGCNRWG costs $1.31 as previously calculated
And at the 5L size
DOCGCNRWG costs $13.53
Now I've never used TAW so I'm probably going to do a photo test with my concoction to check it's cleaning ability and then you guys can be the judge. Has anyone tried to replace TAW with a less expensive alternative? Has anyone used degreaser or APC in their blend? Citrust Wash and Clear could also be used as an alternative to CWG. Please feel free to give constructive criticism on anything (dilutions,products,mathematics). At this price you could even potentially double the amount of product in the mix (making it stick better and stronger) and still make out like a bandit.