Clear plastic rock guard, paint protection diy or have dealer install

1.)Is there any preferred if any manufactures out there that I can purchase the clear plastic rock guard protection clear plastic and install myself?
Dealer wants almost 1k for hood/door edges/mirrors/headlights and door handles

I am tempted to buy this diy plastic protectors about half the price~$500
http://www.invisiblemask.com/paint_protection.htm

2.) dealer wanted to sell me a paint sealer? To fill in paint pores from factory?
Cost almost 1k?
Is there any other product out there that does the same or similar I can do myself?

Any help appreciated.

 

I'm still on the fence with the plastic rock protectors (an unexpected furnace replacement took away that option for a while anyways), but I went to a local detail shop for the paint sealer. It was about half the price and according to them way better quality. I got Xprotect installed, the dealer offered diamondcote.