I'm trying find out if it is possible to reverse, or correct the effects of hairline cracks in acrylic caused by isopropyl alcohol. They are very mild. I'm not sure where to look for an answer or who to ask.. Any help would be greatly appreciated!

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    $\begingroup$ You can carefully heat the object to a temperature close to the melting point (160°C for PMMA, so perhaps 130?), and slowly cool it again. Or (thats basically the same trick, you lower the melting point instead of heating) put it in a vessel together with an open beaker with isopropanol for a while, and afterwards take the beaker out, and slowly (over hours) vent the isopropanol that now diffuses back out of the acrylic. Warning: That's bound to work against the cracks, but the dimensional stability of your acrylic item is in grave danger. $\endgroup$ – Karl Oct 5 '20 at 5:39

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