[miyu1975]

...that acetone will eat through a styrofoam in about 2 seconds...
it also cleans up the floor nicely too.

 

[Lionclaw]

Yup It works well for lost foam casting. I believe the acetone is safe to use on fiberglass, so you can make a foam blank of a part (air scoop, etc), glass over it, then use acetone to eat out the blank.

 

[miyu1975]

ah...good to know. I am working on fiberglass right now too....slowly, very slowly.

 

[engineerorange]

gasoline

gas works equally as well, allbeit slower.

 

[Ironflight]

gas works equally as well, allbeit slower.

And gives a MUCH more satisfying "boom" when things go wrong....

Paul (semi-retired firefighter)

 

[osxuser]

Depending on the foam... yeah that sucks. Hotwire safe foam isn't poison, it just smells really bad.

 

[az_gila]

Not the case for Styrofoam...

hope NOBODY is breathing the gases let off from "melting" the foam.
especially if you are dumb enough to use a torch! cyanied

...which started off this thread.

As always, the MSDS is a good guideline....

HAZARDOUS COMBUSTION PRODUCTS: Under fire conditions polymers decompose. The smoke may contain polymer fragments of varying compositions in addition to unidentified toxic and/or irritating compounds. In smoldering or flaming conditions, carbon monoxide, carbon dioxide and carbon are generated. Hazardous combustion products may include, and are not I limited to, hydrogen fluoride, hydrogen chloride and hydrogen bromide. Studies have shown that the products of combustion of this foam are not more acutely toxic than the products of combustion of common building materials such as wood.

..and can be read here...

http://engineering.union.edu/~rapoffa/MER214/laboratories/lab7documents/Styrofoam MSDS.pdf

No cyanide here... are you thinking about urethane foams?