Oh yes you can!
I have painted many lamps in the past so when a client brought me these awesome metal, garden angels I did not hesitate telling her that it would work.
It opens up a whole new world when you consider painting items like this throughout your home. Statues, lamps, frames, planters and other decor.
I used Old White and an edging Wooster brush for the cracks.
These guys will need maybe 2 coats and some touch ups. I will then show the client how they look with the deep brown color coming through. I like things to look older than they are so I will leave quite a bit.