January Clearing 3

How to clear the studio? Some thoughts:
Useful for oil painting in current style: keep
Possibly useful for oil painting: maybe keep
Useful for watercolor painting in current style: keep
Useful for teaching oils: keep
Useful for teaching watercolors: keep some
Useful for acrylic collage: keep
Useful for plein air: keep
Haven't used in 3 years: consider clearing
Haven't used in 5 years: strongly consider clearing.

So... looking at boxes in the top of the studio closet:
Handmade paper: keep
Collage: keep
Texture tools: keep
Watercolor techniques reference cards: keep
Powdered dye: keep
Projector: 3 yrs. Think about this.
Roll of book cover: keep
Photos: need to go through these. I can't keep every photo I ever took, can I?
Chinese brush supplies: 5 yrs: This I can give away.