Okay, as for just dunking the mask in saltwater, there will be no considerable differences as far as I can tell. It’s just saltwater. The reason most things decay in the oceans is because of all the algae and coral and general life that is in the ocean. if you tossed a plastic bottle in the ocean, it could last for years which is why everyone’s so upset about them. So the saltwater thing just won’t work.
Pointing this out for the bleach. It, again, won’t do anything.
Okay, well, this actually depends on what stuff LEGO puts in their plastic, but I’m fairly certain it shouldn’t do anything.
For something interesting, I recommend rubbing alcohol. You’ll have to mix your own solution if you want to water it down, but if you’ve ever gotten sharpie on a LEGO, and thought some alcohol ought to do the trick you would know of what I speak.
DON’T USE BLEACH. PROFESSIONAL OPINION HERE. I TRIED IT. MY MASK NO LONGER LIVES.
Srsly tho, bleach dissolves lego pieces. I tried it in substitute of hydrogen peroxide a few moths back (lol) and it created holes in many of my parts. All it does is make them turn whiter…
Pretty much just gross. Distorted the plastic, made those really thin parts in the pieces, etc. Not to mention, it greatly increased the fragility of the parts as well. The parts came out looking like a wet turd xD
If you’re looking to make pieces look corroded, look elsewhere.
@Hawkflight, @BioRaiders532, most LEGO elements are indeed moulded in virgin ABS plastic. I believe ploycarbonate is (or was) used for transparent parts. Other parts, like Inika masks, hoses and other rubbery elements are evidently made from something else.