Oil proof brush?

[John ReeseParticipant @johnreese12848]

I have a small garden tool like a 4 pronged claw for dragging masses of long tangeled chips out of the chip pan. I use a margin trowel with a rectangular blade about 2 1/2" x 4" to scrape the fine chips into a dustpan. I haven't considered using old paint brushes for swarf. Either they are too good for that use or were improperly cleaned and are a near solid block of hardened paint.

[Bill MullParticipant @billmull]

Posted by Ian B. on 18/12/2020 11:17:47:

Agree SOD. Even PTFE will leach some particularly nasty stuff in the right circumstances. We had to change all the massive insulators in reactive ion etch machines to cross linked polyester (1" thick plate stuff) because of this. And I am very wary of using VITON 0 -rings for anything these days. They are extremely heat sensitive. they leach hydrofluric acid at fairly low temperatures and yeah I got burned. Problem is they were the only polymers that did not out gas at the pressures we were pumping down to. Add heat and BINGO.

Ian, that is interesting regarding the viton o rings. I remember hearing about potential dangers of working on equipment containing viton which had been exposed to high temperatures or fire.

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