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Old 08-18-2019, 10:59 PM
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Originally Posted by fyrstormer View Post

Oh lord. Really? When plastic turns light-grey after you spray brake cleaner on it, that's because the surface layer of the plastic has been damaged by the brake cleaner and the surface is now covered with microscopic cracks. This is the same thing that happens when you leave plastic outside in sunlight for months, except in that case the damage is caused by radiation instead of a chemical solvent. "Treating" damaged plastic with WD40 might make it look better, but that's only because the tiny amount of oil in WD40 soaks into the microscopic cracks in the plastic, reducing the optical-scattering effect of the cracks, so the surface looks smooth again. But WD40 absolutely does not fix damaged plastic. (neither does Armor-All, in case there's anyone here who likes that useless crap.)
For many years I use brake cleaner. It is cheap and easy to get (I buy a box of 15 cans for just 18 euro) and works awesome. Never had issues with weak plastics than only with huge crashes
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