[gtobird]

I beadblasted a set of hideaway headlight assemblies (metal doors, buckets, etc). Just like another set I cleaned up years ago, these had some sort of black tar like substance on them in odd places and it seemed to be totally random as to where it appears. In sort of looks like long wide drips. Was this just some undercoating that accidentally was applied to these at the factory during assembly, or was it purposely done?

On the earlier set I did and on this recent set, it was hard as a rock. If you scraped it off with a knife, the metal underneath wasn't rusty, so I figure it had to be done at the factory, or at the very least, when the car was new.

Thanks
Old Joe