Firstly is the build up or consistant contact from oils transfered from the head or hands, usually from bald gentlemen, the tell tale signs are a bubbling of the leather where by the finish is almost repelling and lifting from the hide, the other cause is due to the user of the leather item being on some type of medication, this perspires out of the skin and thus absorbs into the leather and again repels and eventually lifts the leather pigment the finish.
We repair bubbling leather, peeling and fading leathers on a weekly basis by way of sanding off the areas, cleaning, prepping and neutralising any further contamination.
When the prep work is complete the leather colour is custom mixed along with a pigment adhesive and then applied in several coats curing each time until the surfaces look like new. After the pigmentation process is complete the finish of the leather is topped with the correct sheen to match the surrounding leather on your sofa to invisibly blend in the restoration work to a fine finish.
This all in one leather repair system we use always gets the results we know the customer will be happy with, with the fading and peeling leather reversed the suite is soon back to looking just like the day it was bought....