I am certain this has been discussed, but a couple of searches yielded nothing close.

Is it safe to paint or powder-coat the j tubes, branch pipes, and warm air valves? I doubt that painting the outside would pose any risk, but I would like to at least get some primer on the inside to prevent rust, but I have no idea how hot these get.

The last thing I want to do is unknowingly huff my handiwork while driving.

and do not mix...

I use high temp engine paint and then bake them in a oven I've got for shop use only.

I use the high temp paint as well. Bake in the oven when the wife is not home. For 4 or 5 hours

I've always been leery of the 2000 degree shaker cans but admit to using them on occasion when I want piece of mind

You can always send them out for some real ceramic coating. Now THAT is piece of mind for hot stuff...

They don't get THAT hot. I like powdercoat.

I powdercoated all of my hot air parts. No smell except for the first time, and that was idling in the driveway last fall.

Works like a charm.

The new air duct hoses smelled the most.

John

I powder coated all my piece's, no smell's or problem's. John