In place of the Coke products- You will not have as much of a mess
with the sugars and other solution additives if you use OSPHO
concrete cleaner- it is a standardized solution of phosphoric acid
that has no additives- easy to mix and at 4.50/gal in my neck of the
woods- its cheaper than coke! It can be found at most Tru-Value or
Ace type hardwear stores- or Agriculture supply houses.
This is as well the same solution I acid electro-etch with and it
works like a champ for that as well (Search orchid archives for
Kahiko’s tutorial on this).
From VA- be safe and have a great day!