Junk Lot - Fourrée or just fake? Two Roman Republican Denarii, etc.

Bottom feeding as always, got a lot of four ancient odd-balls for $8.50. Junky stuff, but I've been having fun fooling with them. Two of them are Roman Republican fourrée that might not be ancient. I am quite unfamiliar with this sort of thing, so I thought I'd run 'em by y'all.

First is (more or less) L Julius Bursio Denarius. 85 BC. Winged head of Genius or Apollo Vejovis right...Crawford 352/1a (?). It is obviously plated, with one edge smashed flat, then clipped, showing a dramatic copper core exposure along a sharp edge:



The next is M. Volteius M. f. 76 BC. with a biga of snakes. Always wanted one of these (but not like this!). It is all copper (bronze?) with what looks like plating - but not silver? Just the rotten core, perhaps. The snakes are hard to see, but the green crud (bronze disease, probably) follows their coils:




One other oddity, not Roman - a Mysia, Pergamon Athena / Owl. I think this one is real, but it has a horrible reverse encrustation that obliterates the owl - possibly removable, but I have no idea how (you can just see the owl's head peaking out the top of the blob - sorry about my blurry photo). I rather like the obverse with its psychedelic patina:




Finally, the reason I paid $8.50 for this lot: Quinarius 97 BC. Laureate head of Apollo / Victory inscribing shield on trophy. Egnatueleia 1, Syd 588, Crawford 333/1. It has been overly-cleaned and has banker marks, but I was pretty pleased with it nonetheless - from what I've seen online these are a bit crude looking in general: