Dixiedrifter said:
So my game plan should be:
1. Apply degreaser on the oil/grease spots work in with brush and let it dwell. Hit with hot water.
2. Wet rest of drive with water to help prevent drying, then apply either citric acid or general purpose cleaner with hand sprayer.
3. Hook on surface cleaner and rinse with hot water.
4. Apply a brightening solution of 50/50 12% bleach solution.
I'm still a bit confused as to how citric would clean the concrete before washing. I thought some sort of surfactant would be needed to get any petrochemicals out.
One thru three will work fine... If you use the Citric you won't need number four and I would avoid #4 at all cost anyhow, if possible, do to the waste factor and the negative effects it has on plant life.
Call your local chem supplier, they should be abe to provide you with a granule form of Citric Acid. Then just try it out. You will see this a chem for many uses and it isn't regulated by the DOT, so you will also find that it has many advantages over other chems.
I still keep a MSDS on hand to identify it in case I can't or it is spread across the freeway along with the rest of my trailer...
Don't eat this stuff, it will make your lips pucker... It is what the food industry uses to make things tart...
And yes it works with cold water also...