When mine happend, It was in there for a week before I was sure there must be something wrong.
The doctor spotted the rust ring before the metal!! ( it was from a ford
)
2 Years ago I was refitting the Mondeo front pipe. I was smearing firegum on the joint with my arm stretched horizontaly from the side of the car to the exhasut. somehow some gum flicked all that way, sideways, right into my eye! I don't know what's in it but it stung. And after 2hrs checking and washing it had not cleared and my eye socket was all swolen and puffy..
The hospital could only give a local anasthetic and flush flush flush. There was no record of the product on their HAZARD system and beein boxing day the manufacturer was closed....
Eye drops for 2 weeks cleard it all up.
TT