What type finish do these have: Goth T-Bird, 70's EB-3?

[Southway]

I bought some cheap guitar stands and they are not supposed to be used with nitrocelulose finished guitars. I found on the Squier site that my Squiers are polyurethane or polyester, but I can't find any info on my 71 or 72 Gibson EB-3 or my 09 Epi Goth T-Bird, and actually would like to know about any/all Epi bases (for possible future basses).

Thanks!

 

[Showdown]

The Gibson is nitro. I don't know about the Epi.

 

[Legattabass]

I think the Epi is poly. It's crappy, whatever it is. I wouldn't worry about it

 

[Southway]

Thanks guys!