Re: petrified wood
Not knowing the nature of what you are trying to clean off, we use muratic acid for the whitish ash-mud coating on some of our pet. wood, especially that from Saddle Mtn. Wash. We mix it 1 part acid to 5 parts water, and dip our pieces. We let them soak in a plastic container until they quit fizzing. The size of your pieces will likely require a spray or paint on, and rinse. Muratic is used for cleaning stone surfaces, won't hurt quartz. Be careful, good luck.
From Larry Larson - April 03, 2010 at 11:47:00