Let me just tell you that the trick of Wintergreen oil and alcohol absolutely will NOT do what you want. I left mine in the solution for a couple of hours and pulled out a grey, oily, fragile mess. I was going to leave it in for an entire day like a YouTube video demonstrated. Apparently the wintergreen works great on new rubber made in the last 40 or so years. It appears NOT to work on 100 year old rubber. Soupy mess. Granted, I'll give it a day and let it dry but I really don't have high hopes.
I have spoken.
