Combine two parts linseed oil and one part linseed oil in a bucket. Apply the solution to the entire couch using a clean cloth. Allow to sit overnight before rinsing with warm water.
Trim any loose fibers around scratches with a pair of scissors. Cut as close to the leather as possible to minimize the appearance of the scratches.
Apply leather recoloring balm to the entire couch with a clean cloth. Work from the top of the couch to the bottom, rubbing in a circular motion. Wipe away excess balm with a new, clean cloth.
Buff the couch with a chamois to set the dyes in the leather recoloring balm. Start at the top of the couch and work slowly toward the bottom, rubbing in a circular motion. Continue buffing until the leather is restored to its natural sheen.