Should I grind the steel rockers?

Finished grinding the rockers, some definitely did not need as much as the rest. I had some surface rust accumulate on the heads over the winter, so I thought it would be a good idea to clean one of the heads with white vinegar. Well... I was left with a bit of a yucky mess, so now I cleaned it and soaked the head in WD40. Eh, it'll be fine, it's wiping off.

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