I am trying to find information on what type of hard clear coat, shellac, enamel or whatever it is they used to coat the Pacifica Rock Band Belt Buckles from the 70's. I have several buckles and would like to buy whatever hard clear coat it is to recondition these buckles, repair, etc. because they are worth a lot of money and look very nice when in near mint to mint condition. Thanks for any info anyone can help. I need to know exactly what it is so it matches what is currently on the buckles themselves. Thanks.