DIYbanter - View Single Post - Problems using regular enamel paint in microwave oven?

larry moe 'n curly

wrote:

A couple of things come to mind, both of them pretty remote:

a) the batch of paint used had Titanium Dioxide as the white pigment.
It is just possible that the paint as-applied was more absorbtive than
the OEM paint & metal combination and so that area turned into a 'hot-
spot'. If they did an area say the size of a business card or more,
that would be the second thing that came to mind and that based only
on very careful prep... see b) below.

b) conversely and more likely, the prep-work took the microwave-
reflective primer off and exposed the steel. BAD MOVE as without that
reflective coating the metal will get very hot no matter what sort of
finish coating may be on top.

Does that apply only if there's a coating on top of the metal?
Because we have a microwave oven with a stainless steel interior