Then you ll be gluing your images onto that surface. And then, sanding and varnishing after gluing. And then that step will probably be repeated a few times, usually three or four. So it s critical to work with DRY and DUST-FREE surfaces. When you apply your sealing coat, be it varnish or polyurethane, if there s dust or a stray hair, it will show up and it will be difficult to sand it away.
Cosmetic brushes are excellent for removing undesirable dust-bunnies.
It s also important to use good quality-brushes, and for the simple reason that hairs in the brushes stay in the brush and won t come dislodged and end up on the surface of your artwork. Let s think now about paint, glue, and varnishes. Get an assortment of sandpaper from your local hardware store, from coarse to super-fine. Once you ve sanded to your satisfaction, rinse and dry the object so that it s as dust-free as possible. Or, you may need to prepare the surface by painting.