How do I frame and mount a small painting in oils done on canvas paper?
You’re correct. The painting will need to be “floated” or adhered to a piece of hardboard first. (A couple coats of gesso on the hardboard will help prevent leaching of any oils in the board onto your paper over time). You can fix the paper to the board with any quality glue that is suitable for use with wood and paper – drying time may be up to 24 hours. Then mount the hardboard and paper in a frame, preferably under glass. Paper is not the ideal support for oil paints so careful handling is required. I really would suggest taking the painting to a local craft store if this process is unfamiliar to you. The cost will be relatively low for a small painting.