I wouldn't use Teflon myself, either... Delrin or acrylic or glass are all nice and clean.
I only like glass, Stainless and annodized aluminum.
A person running hot and chain
vaping could melt Delrin or acrylic.
I forget which
rda it was but they used a Delrin insulator and the Delrin melted.
Running a short
rda likr the Mako shark, Derringer, stumpy, Rogue,Freakshow Mini could melt Delrin or acrylic. I don't think a standard height RDA or RTA would get hot enough
Everyone knows Aluminum is a soft metal but after it has been annodized it changes the molecular structure a d becomes harder than Stainless steel. This is why professional chefs use annodized aluminum cookware. The lightness of aluminum but more durable than Stainless steel.