But what to do with the successful ones you'd like to frame? I mount them on acid-free foam core so that I can varnish, and frame like any other painting on a panel.
What you need:
~A sketch you think worthy of framing, (the hard part)
~A clean flat space to work on (also a challenge in a busy studio, this table is in the thinking corner of my studio, and I keep a clean sheet around for projects like this)
~Acid-free foam core, about 1 inch larger than your piece
~Old but clean piece mat board or foam core larger than your painting (I used the back of an old canvas board)
~An extra piece of mat board or foam core larger than your piece
~An Exacto knife
~Drafting brush or clean Swiffer
~Lineco pH Neutral PVA Glue
~Old paint brush
~Dartek Plastic Film, Glassine or sheet clean plastic
~Self healing mat or cardboard to cut your foam core on
Click Read More below to see the directions.
Spread it around in a thin coat with the yucky brush. I think a stiff flat or filbert works well for this. The bigger the piece the bigger brush I'd use. (note the paint under my thumbnail, that means it was a good day :)
You may have to add more, but it's better to do that than to start with way too much. (dual wielding not a necessity unless you are also the photo documentarian :)
Turn the sketch over, position it in the middle of a piece of acid-free foam core that you have cut 1 inch larger than your sketch.
Dartek Film, which I use for wrapping paintings when shipping them. It's a plastic that doesn't stick to paintings and is used for wrapping them for archival storage in museums. For this purpose, it is overkill. A piece of glassine, tracing paper, or clear plastic would suffice.
Roll over the plastic covered sketch with the brayer, working from the center out, making sure there are no air bubbles and that it is completely flat.
Cut off the excess foam core. (Sorry I forgot to shoot the figure sketch but here is an in-progress shot of a still life being cut down to size)
Varnish as you would any other painting. Pick out a killer frame, hang the piece and hope the Red Dot Fairy shows up!