Re: plywood for hive bodies ?
Use exterior siding (T1-11). Don’t go so thin that you do not have strength for the width of super or body. Hit the exterior with a good coat of primer before you paint on any exposed portion. Take a look around and you will see that it is a combination that lasts for exterior buildings. Exterior sheet product, exterior glue, exterior primer, exterior paint. IMHO Tightbond makes a great glue but it is not paint primer, try it and you will find that is where the paint will fall off and the sun will destroy it (as Tommy Mac says read and follow the directions).
“Why do we fall, sir? So that we might learn to pick ourselves up” Alfred Pennyworth Batman Begins (2005)