1/4" Delrin 1/4" Delrin FabproHelp (Mechanical) (OP) 28 Feb 18 15:01 Does anybody have any experience cutting delrin on a laser before? we have experimented with trespa in the past but never something like this. Looking for cut condition input. Thanks RE: 1/4" Delrin Compositepro (Chemical) 1 Mar 18 22:52 Delrin burns with an almost invisible smokeless flame. It breaks down into formaldehyde which then burns cleanly. If the formaldehyde does not burn, it will be a toxic gas issue.