Don't get too excited seeing a reply, I wasn't sure if it would be best to not. I personally do not have or know of any enclosure like you described being used to safely and healthily house sugar gliders. I am aware of such being used for some reptiles, and perhaps maybe other animals can be, but I just don't know that much about it with use with SGs.
I personally do not feel that would be ideal, just for the reason your sugar gliders could not climb on it. Plus, I'm not sure the vents would be enough air flow.
Can you keep your cage where you can roll it outdoors and use a hose to squirt it down? Some people do that 2-3 times a year (maybe more, not really sure). If I could keep mine where I could roll it out, I'd do it at least 2x a year. As it is, I've only been able to do this once, and that was when I was moving, and had to take it outdoors anyway. For now, I use a hand-held steam cleaner on it 2-3 times a year (mostly like 2x, lol). I wipe down with a sponge and v/w solution (aprox 40/60) on a weekly bases, well most of the time, I skip a week here and there.
Maybe someone with more knowledge on the type of enclosure you're talking about for sugar gliders.