Hi, I have been using Sedgwick's leather care recently, and am very pleased with it, both to 'revive' older' leathergoods that have dryed out, and to treat newer items. It does not seem to mark the leather, whis is a problem with some products, but as always, try out on a part of the item first, see
http://www.je-sedgwick.co.uk/products/leather-preparation-care/original-leathercare/#more-244 All the best, simon baker casemakers