How to get chinchilla to playpen?

I am trying to bond with my chinchilla but he won’t let me pet him let alone pick him up. I know playtime is important but I can’t get him into the playpen unless I trap him in his dust bath. And even then I have only been able to do that once or twice a week. He has started getting more wary of the dust bath now though so I can’t take him out at all. I don’t know how to progress.
His cage is in my bedroom and I don’t think I can chin proof it so I can’t just open the door and let him...

How to get chinchilla to playpen?