Couple of questions.   I just got my new Grizzly Table saw.  Living in Arkansas, we deal with a lot of humidity and I am worried about rust on my table top.  What are the best ways to prevent rust, keeping the saw ready to use.

A year ago I had to receive a pacemaker due to  neurocardioginicsnycope,  passing out due to sudden heart rate drop.  I still have dizzy spells, almost always after I have been sitting for a while and stand.  I know I have heard of a device that can be installed on a saw that will stop the blade in less than one second if flesh touches the blade.  I feel it would be a good safety precaution for me.  Can anyone give me any info on this and has anyone installed one on their saw.  I know I read of it, but can not find the article.  Thanks in advance.  Jerry