After looking closely at the chassis I noticed some places were I did not really want water, mud, sand & gravel to have a chance to build up and stand, rusting my frame away so here is what I did. starting up front I sprayed some of the expanding foam in the ends of the bumper, not a lot just enough to cap the tube off. (I did not block the small drain hole in the bumper just wanted to keep out the big stuff.)

Next i put two bolts in the front frame were the winch plate would fasten with silicone on the threads to seal out water. Later when I install my winch I will reinstall the bolts with silicone again. These two holes run all the way through to the rear were they will also be plugged later in this post.

Now I went to the back and dropped the back skid plate to get to the next part of the frame. You will find 4 holes, two are right behind the rear diff.
and one on each side by the back wheel.

The holes by the diff. are 1 1/8" and the holes by the back wheels are 7/8". I bought these plugs at a auto store to seal the holes.

After going through the mud / water and what ever there is no way when your wheeler is sitting flat water will leave the frame, this even goes for when you wash it, so that is what these plugs are all about. I think these few things I have done will surely help. Thanks for looking