Shelf liner instead of paint for the inside of the recessed shelving.
" I just build a box to the dimensions of the window – usually out of 2x6s. Use either old barn board or rough cut cedar planks for the underside which get screwed or nailed to the bottom of the box. The legs and mounting hardware can be purchased at Lowe’s or Home Depot in various sizes and styles. Paint the box and legs and attach the window to the box with 2-3 hinges and that’s it!" @Jenny powers
No-Sew-Window-Treatment-- via @Diane Henkler of In My Own Style