I think you may be entering tricky territory.
The choices of available hammered finish have diminished in recent years. The formulation of some types has also changed. Some say the new stuff is no good. No doubt health and safety and/or environmental regulations have something to do with the change.
I don't know what Myford hammered green looks like TBH. My interest in this question starts from my ownership of a Unimat SL.
There has been a lot of traffic on the Unimat groups.io forum on this topic… mostly hypothetical and around product availability I'm afraid. I have not seen anyone (in the UK anyway) saying that they have tried X product and had good results.
The Unimat uses a light green shade of Hammered paint. Some have said it is RAL 6011 Reseda green. Maybe it is. My lathe and motor are both light green but one is a deeper shade than the other.
Unrelated to the discussion on the Unimat forum I pulled my late 1980s Vixen SP102 telescope out of hibernation recently and remembered that the mount also uses light green hammered paint. Looking online I found folks saying that this was also RAL 6011. Once again I did not find any success reports from UK people.
As you have found, there is also a community interested in Startrite machinery (which I must admit I know nothing about) who are also looking for light green hammered paint.
The other product I found is this one
Sorry but like others who have discussed this subject, I have not actually tried the currently available paint… on either my Unimat or my telescope mount.
I think that matching will be tricky, so a full repaint is probably a better bet than trying to do spot repairs.
The instructions may give you a clue about formulation. The old stuff used to require nasty thinners (Xylene??) and stated that the second coat must go on in a few hours after the first.
Like I said, I have no clue what colour Myford hammered green was so RAL 6011 etc may be totally wrong.