Started my upper grill block today. The wind blew a for sale sign into my yard last fall. That would probably annoy normal people, but for an ecomodder it's free coroplast!
The Civic upper grill uninstalls from the car pretty easily, so I decided to take it off so I could accurately trace for the cut. I found out the grill seperates even further, which allowed me to take it apart and get a really precise trace for the shape I wanted. I cut it with a utility knife and my precise trace became sort of unprecise lol.
I started out thinking I wanted the grill block in front, but remember one of my goals is to not stand out from normal cars. Also, I wanted a clean looking install. If I were to put the block in front of the grill I would want to add some fiberglass and body filler to basically mold it in so it blended in smoothly. I decided to install it in the back, a more stealthy look. From what I have read, it's still more effective than no grill block at all.
Luckily there were existing tabs sticking up that I was able to just cut slots for. This makes mounting easy, and allows the coroplast to sit flush so I will be able to seal it airtight so no air will escape beyond the grill.
I sanded it down to remove the shiny finish, and hit it with one coat of primer. I had some flat black engine paint laying around, so that is what I used. I think once it dries it will be more of a flat finish, no so glossy. I will update with pictures once I install it on the car (and figure out how to attack the block to the tabs the best way).