What can I use to seal command key to prevent further cracking?

Question:

I have had problems with my command key cracking. Is there any way I can seal it to prevent further cracking? I'm not interested in replacing the key or getting a cover. I also don't care how it looks. I just don't want it to crack or peel off any more than it is.

Thanks!~

For anyone that wants to tell me to type differently:

I know this is because of my nails and my typing speed. I want to address this issue before anyone tells me I am typing wrong. My nails are as short as possible (I'm a guy) but still hit the keys directly. I also type 90+wpm, which increases the stress on the keyboard.