Tom, I owned a window tinting business in N. AZ for 4 years. I cleaned acres of glass before I sold the biz.
We cleaned all kinds of glass with first - white scotch bright pads, not green of red only white. Then using one capful of liquid Joy dish washing soap to 3 gallons of water in a spray bottle, we had big spray tanks. Use only fresh single edged razor blades to take off the chunks. A razor blade is considered dull when you place fingers on both sides of the blade and pull gently away, if you feel burrs dispose of it and get out a fresh replacement blade. The soap acts as a surfactant and extends the life of the razor edge. Spray the glass with the very lightly soapy water, then scrub with the white scotch-brite pad. While you have a soapy film razor the glass, edges first then the mid section. Acid helps with rust. White vinegar, diluted muriatic acid, or CLR a boiler cleaner all may work. I would do a test section to be sure you are not going to scratch the glass. Good luck and careful with the razor blades they can be dangerous. Dana Orzel Great Solar works, Inc. E - d...@solarwork.com V - 970.626.5253 F - 970.626.414 C - 970.209.4076 "Responsible Technologies for Responsible People since 1988" From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Tom DeBates Sent: Thursday, December 30, 2010 9:30 AM To: re-wrenches@lists.re-wrenches.org Subject: [RE-wrenches] cleaning modules hello Wrenches, I recently purchased some used modules. Unfortunately, they were mounted near a railroad track and many have a film of rust on the front surface. I have tried a few products; Dawn, Simple Green, vinegar (5% acidity), and Krud Kutter to safely remove the rust. So far the vinegar seems to be best when considering cost, disposal ,etc. But it still takes a good amount of time and "elbow grease". Today I will try CLR. Has anyone else run into a similar situation? If so, what products and/or methods did you use to remove rust stains? Awhile back I had to remove some urethane caulk from the face of module and had to resort to a solvent-based chemical (acetone....yes, acetone) with disastrous results..... thanks, tom Tom DeBates Habi-Tek 524 Summit St. Geneva,IL. 60134 630-262-8193 fax 630-262-1343
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