The UV backed plywood is just prefinished plywood. It's a good finish they use but I wouldn't like it because it would make the cabinet more time consuming to build. It's would be like building a melamine cabinet, you would need to dado any place where a joint would be in order to be able to glue it. You could use epoxy without running the dado's but it wouldn't be near as strong of a cabinet using raw wood and wood glue. Another issue is if you put solid wood faces on the cabinets. You would have to stain and finish the exterior which would mean you would have to mask off the already finished shelving inside. I prefer to make everything raw wood and when it comes to finishing spray the finish inside and out at the same time.
I always build my face frames out of hardwood, with dado's in the stiles for the cabinet sides, and dado's in the sides for any shelves.
Is there any reason that I can't do the dado's like I normally would? Also, I like to cut and dado everything first, get it up to the point of assembly, and do the painting/staining and clear coating on the individual pieces, so I don't for see any issues with masking anything off.
With that being said, assuming I go with UV backed ply, does the UV part need to be sanded? If so, is 320g ideal? Would it be ideal to sand and shoot some lacquer or WB poly on it? Or is the UV side already sanded and finished with a clear coat of some sorts?
Steve, I appreciate your feed back on this, and I understand why you don't do this, but the limitations that you outlined are not a problem for me with the way I do things. Am I missing something else?