Just picked up a bargain set of Mondeo ST220 Recaro front seat to go in my ST TDCI. Bolsters are all good with just a small of restitching needed on the drivers side but what is best product to clean them up?

Also, what is best to dye to back to a decent looking black? They don’t have to be perfect as they are going in my £187k mile workhorse mondeo but would like to make them more presentable if I can.

Cheers in advance