Just use it as-is for contact printing, also you can use pencil etc. on the back of the paper neg (or a sheet of tracing paper if you don't want to make permanent adjustments) in order to hold back selected areas.
If you want to make a larger version of the contact-print, then re-photograph it and use that neg in the enlarger. Pulling the film used for the copy might be helpful, depending on what the contact-print looks like.
I don't know anyone who is stripping the emulsion off paper for use in an enlarger. Is there anyone?