Dust !!!!
I'm someone who has multiple projects going on at the same time.
Painting, sculpting, sawing and sanding, making scenery, you name it.
There's always one drawback: the models I'm painting always get dusty. But tidying them up all the time isn't ideal either.
A complete display cabinet on my desk isn't a success either.
Vases or large glass containers are suitable for temporarily protecting your models or sculpts from dust.
With a visit to a thrift store, you can find a suitable solution for little money.