When I got this coin, it had been varnished. I soaked it in acetone and, underneath the coating, it was a pretty nice example with good detail on the reverse.
Maximinus II
A.D. 313
21x22mm 3.9g
IMP C GAL VAL MAXIMINVS P F AVG; laureate head right.
HERCVLI VICTORI; Hercules standing right, right hand behind back, left leaning on club covered by lion's skin, Z in left field.
in ex. ANT✶
RIC VI Antioch 170b