All of my experiments with fixing enamelware chips, I have avoided using any products on the business surface of pans that will get heated. Rustoleum corp had a stroke when I even ASKED them about offgassing of their high heat products and refused to discuss it. So for my purposes all the applications are to non food contact surfaces or items that will never be heated.
That said, I picked up this pail which had a curious and unphotographable texture to the interior. It was rough and felt basically unglazed, this pail may have had continuous exposure to an acid like vinegar that etched the surface. I had tried soaking a basket and ended up having to rebleach the interior, as the rough surface is at the mercy of any color staining.
I filled the internal chip voids with Rustoleum’s Appliance touch-up epoxy, which settled into the divots and required a second coat to build it up to a smooth level. The Homax Appliance touchup is much thicker product and unless you are careful, you would end up with a hump that has to be sanded smooth. But they both work.
To seal the interior surface, I started spraying light coats of Rustoleum’s Appliance Epoxy. To avoid causing any ‘runs’ I just did light dustings and put the lid on to let it settle. I should have taped around the top edge to keep the black rim from getting over-sprayed but it wasn’t a big concern for me. It took about 5 or 6 coats and they do seem a little rough to the touch, if I get bored one evening I may take 1500 grit sand paper to it and then a last coating. But I call it a success when the surface doesn’t take on the color of whatever I am throwing into it.