04 Nov 2010, 03:23
There is a metal-treatment chemical available in the US...it's called CLR (for Calcium-Lime-Rust remover). The chemistry completely dissolves the crusty green goo and leaves the metal bright and clean. You immerse the module, leave it until the bubbling stops, rinse thoroughly with distilled water (with a pinch of baking soda added, to neutralize the acid), and let dry overnight under an incandescent lamp (the gentle heat drives off moisture that would otherwise hide in all the little nooks and crannies). Fire it up and...it'll either work, or not; but if not, you're essentially out of options. I have sucessfully used this technique on a few P2 and P3 modules. This treatment is also the best there is for removing acidic residue from the inside of cases that have suffered battery leakage.