I've been continuing with some experiments in making Sprue Goo without actually having any sprues, and using acetone instead of plastic cement.
At first, the only thing I successfully melted was styrofoam, and it worked OK, but I knew that I was not truly getting the best results, so I started experimenting. Eventually, by trial and error, I found three kinds of plastics that worked correctly (most trial plastics just sat in the acetone and did nothing).
These were: plastic bread tags, CD jewel cases and plastic push pins. All three melted into a squishy liquid plastic-putty that could be put in an Oyumaru mold and - after letting cure for 1-2 days - became a hard plastic figuring or 'bit'.
Here's a goblin I cast with Oyumaru and then re-created with bread tabs. Some detail is lost, but overall, it's not too bad (I still need to cut off all the flashing, or course).
Front
Back
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhz7W4UnoKNHPOsKhc82S3TxLWPrZuUf2pAusBfRaRHcWeKgTupCOSSiZJ6pYx-G40UY7H_EPKkNuFaA5C2tM6rZzQ4OYtuPcxar3xaaWtGjARue_seK2LrIHEpVDHgNFEFqwqZ-fN3CaxQR2NSkGNzRhbcFGnXK7I7fwm_eqhUtn0D-3TskgY8BIc_tJo/s320/a%20i%20o.jpg)