No...just another answer (Zoopseal) for a non-question. You don't need a damn thing.
Just don't go after every little thing with a scotchbrite...let the "elements" seal it a bit for you. I barely get fingerprints anymore. If you put a sealant on it, you'll have to reapply it to any area you scotchbrite to remove a scratch or clean a stain later.
Why do folks try to make simple so hard?
Here...pay attention: NASA invested millions with the Fisher Pen Co. back in the early 60s to develop a pressurized pen using an ink gel that would write upside down, when wet, in heat or cold and in zero gravity. That resulted in the Fisher Space Pen, a fine piece of technology that works under all conditions (hell, I have several myself).
The Russians issued their guys pencils.
KISS