Few questions about rustproofing exposed metal
 

I'm going to be cutting my fenders in order to add widebody overfenders and I'm concerned about and rusting that may occur by exposing any metal. This is more of a concern in the front as the rear will have the metal shroud folded and sealed over the exposed metal.

Another question, is it possible to fill in the divets of a widebody kit with bodyfiller or another mixture then have that painted over to give it a cleaner look (Cheaper then going molded). Divets/indents as seen here:
Thanks for any help! I really appreciate it :)
http://imgur.com/Z3jmFek.jpg

I'd be interested in this as well to winterize the installation spots from my side skirts/lip/diffuser

Paint and clearcoat? Or just clearcoat the rivets/screws before using them.

I'm more worried about the edges of post-cut fenders. Here's a pic so it makes more sense!
Edit: You were probably replying to the guy above, my bad
http://image.prntscr.com/image/16745...29b29d1a83.png

OH! So while this may not be the absolute best way to attack this, B is for Build had a pretty great method as to solving this:

[ame="https://www.youtube.com/watch?v=zx_lArJxCB4&index=6&list=PLHFFREt3OXLHs_BS ce-_WDgj9AWCah8PE"]Plan B BRZ Pt 12 - DIY Install Rocket Bunny Widebody Kit Pt 3 - YouTube[/ame]

There's likely a more professional way, but from a DIY standpoint, this is the best I've seen as of yet.

Thanks! I should've gone back and watched all of Chris's videos. That solution seems great. Just need to find another material to use instead of sheet metal.

When I did mine I covered the bare metal with seam sealer. Like I smeared or to make sure everything was covered, then taped everything off and sprayed the edge with like a rubber undercoating spray. I've run into no issues so far.

And I used rivertnuts and bolts to hold the kit onto the car. I covered the rivetnut with silicone when installing them.

Okay, I was wondering if something like that would work. That seems like the simplest way going about it. Thanks man!