Anybody have a tip for getting cat vomit out of velvet ?

A velvet couch specifically. Lovely.

stop feeding your cat red hots

Toothbrush. Nature's Miracle. Test a discreet location to make sure it's not going to discolor, though.

Been there done that.. let it dry and vacuum the bits. use those needle brushes that you use for cats grooming and that works wonderfully on the velvet to knock the remaining debris off the fabric and remove fur from the chair. Then I would natures miracle after discretely testing other area.

And then get plastic seat covers, they work great during the summer (you can exfoliate your own thighs in the process)