マシューさん返信ありがとうございます。Yenniに尋ねてみたところ、以下のような返信がありました。どうやら、ブラッシング以外の手入れはほとんど必要ないようです。
(少し不安ですが…(笑))
Your Reverse Tobacco Chamois leather requires very low maintenance care. I would use the cedar shoe tree and if you have a suede brush it’ll help removing dirt. The Reverse Chamois leather is heavily oiled so I don’t think it’s necessary to treat it at this time. Depending how often you wear it and if it’s raining a lot you can spray it with a waterproof spray (Nano protector) but not necessary.