По поводу ухода за Wolverine из Хромэкселя отправил запрос производителю. Вот ответ:
Dear Anatoly,
Thanks for the message, and nice boots. Chromexcel has a very high oil content, so it doesn't need too much attention. I like to use either Venetian Cream or Saphir Renovateur on my Chromexcel items. The Saphir is available here -
http://horween.bigcartel.com. I'll have Venetian shortly.
Other than conditioning, a damp, soft cloth and a good brushing are all they need.
Best Regards,
Nick Horween
Всё оказывается просто и незатейливо)