I have a gallon of paint that is exterior latex that matches the color of the inteior trim I want to paint. Can I use the exterior paint on my doors and trim in my basement? I hate to waste the paint.
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Exterior paint probably has ingredients you would not want inside your living space, such as zinc and anti-bacterial elements. Also, it may release paint odor all the time.. something the makers would take into consideration when formulating interior paints, but might disregard for exteriors.
There might be some odor, and the paint might "transfer" when you rub up against it. There's also some chance that it would develop an oily surface since normal weathering would not occur.
That said, there's probably no great hazard in trying it. Exterior paint is not allowed to contain any significant amount of lead, and the other chemicals it might contain don't represent a serious hazard (and might actually be useful for basement trim where dampness may be an issue).
Certainly a lot of doors are painted with exterior paint on the inside.
no health problem.
The only concern I would have is that ext paints are designed to chaulk off over time. The outmost surface sacrifices itself as a way to protect the layer of paint. Rub up against it with a white shirt and you could have a residue that would not require a CSI lab to detect.
But it is UV that brings this out, so it might not be bad in a basement. Also, the higher gloss of a finish texture it is, the less of this occours. a very flat finish will show you more of it.
Myself - I'd probably do it