Permission Based Skins/Collections

Is there a way to do permission based skins or collections?

So if an admin kit is skinned, players cannot use those specific skins - did I miss it somewhere?

Also - Player skin sets are not saving with map changes , I do not see an option for this in the config. Is there a way to preserve their skin sets?

They are saved in a data file however player data is removed after inactivity via the config:
Remove player data after inactivity (days) = 14;

Changed Status from Pending to Work in Progress

Changed Fixed In to 2.1.5