Thats good tho, etch the concrete a bit and take away the oils, and that will give the paint a better tooth to adhere too. I am going to use muriatic acid solution after some spot work, then pressure wash to get the latent oils and acid residue out, then paint.

I would not mix the cementitious material with any sort of thinners, you will likely just end up with some sort of sludge that will not harden.....mind you if you mix it with chocolate, you might get peanut butter cups....