How do you repair a chip in the surface of a porcelain covered metal bath tub?

I have a chip approx. the size of a nickel, in the surface of my bath tub, Is there a product I can buy to repair this?How do you repair a chip in the surface of a porcelain covered metal bath tub?
there's an epoxy repair kit that you can buy at any home center. the repair will not be invisible but it will look better than that big ugly black spot.How do you repair a chip in the surface of a porcelain covered metal bath tub?
Don, I've seen tiny bottles of brush-on epoxy in white and tints, intended for this purpose. I don't remember brand names, but knowing such a product exists might be the first step in finding it.





Check websites for Lowe's and Home Depot, to see if you can get a brand name from the huge inventory they have online.
You can buy touch up paint for porcelain surfaces. The biggest problem is matching color. Any place that sells appliances will have it.