FWIW there are multiple products under the
Simple Green name. As has been mentioned, the the standard consumer product version is a problem if used on plastics and aluminum.
Their website (and many people who use it) state that you should dilute it and
rinse thoroughly,.when used on aluminum...
That said, I don't see why people would do that when more appropriate products exist.
Here is an old post from the US DoD safety site:
------------------------------
Simple Green's not for Aircraft Washing
Don't use Simple Green to wash aircraft or aircraft components.
It has been brought to the attention of the AMCOM Depot Maintenance Engineering Team that numerous units are using the commercial product SIMPLE GREEN as an aircraft wash. STOP! This product has been through DoD testing and was determined to be highly corrosive on aircraft aluminum. It can also be a catalyst for hydrogen embrittlement in high strength aircraft alloys.
While it is a highly effective cleaning agent for floors and non-aluminum/non-high strength alloy vehicles, this product is not approved for aviation usage.
If your unit has been using SIMPLE GREEN on a regular
basis, it is recommended that a thorough fresh water wash with the approved cleaners per the appropriate airframe maintenance manuals be accomplished as soon as practicable. This should be followed up with a corrosion inspection/treatment and application of approved CPCs.
Insure that no unauthorized cleaning products are being used on your aircraft or in the shops as a component cleaner.
POC: (361)961-4041, DSN 861-4041
-------------
They NOW make an aluminum safe product for aircraft but it comes in drums. Called
Extreme Simple Green Aircraft and Precision cleaner. Based on the MSDS it doesn't have alcohol so may be safe on acrylic, but that is for a chemist or their tech support to answer.
Simple Green | CA | Industrial | Extreme Aircraft Precision CleanerLearn about Simple Green's full line of environmentally safer household cleaning products. Discounts, cleaning tips, reviews, special offers and more.
simplegreen.com