Ugly exterior door aluminum threshold

[Sam Leon]

Currently turning over a unit where previous tenant(s) must have dropped heavy pointed stuff down the doorway because it made a few dents on the aluminum threshold.

Also previous owner painted (WHITE GLOSSY LATEXT PAINT!!!) on the threshold and it's wore down.  So I too a wire brush on a grinder and cleaned it best I can.

Still it looks like ****.

I was debating to replace the entire door but on a tight schedule I decided to wait.

Thoughts?

Will spray on metal primer plus a few coats of metallic paint work?  Or will that wear out in no time?  If it lasts 1 year I am OK with that.