Griswold #703 hot plate - were the grates ... enameled or seasoned?

[Spurgeon Hendrick]

Per Greg’s suggestion ... posting this again

I’m hoping to get started this week on the Griswold #703 hot plate I recently purchased. I’ve been reading the threads I have found on other restorations, but I’m still not sure what to do with the grates and the burners. I’ve seen them painted silver and one thread seems to show them painted in a light gray. Does anybody know how they were produced originally?

The grates don’t appear to have any enamel left on them. Unless otherwise advised,  I will default to painting the whole thing in a semi-gloss high temp enamel, but I would look pretty attractive if the grates and burners were a light gray.

Also, are the nameplates (Griswold and 703) made out of solid brass, or are they plated with something?

Here’s what the grates look like now. They are pretty rusty.