I prefer sleepers anyway and really have never cared for cars with things sticking through the hood. It occured to me there might be other folks out there that would rather not buy a Petty Charger kit just for the hood and a resin hood that size is probably not a good idea at all. So here's what I did.
Start by placing the hood upside down on a sheet of plastic thicker than the kit plastic, or you can layer several pieces. Using a mechanical pencil trace the opening. I took my cutout and gave it a gentle bend.
The bend approximates the curvature of the hood. My preferred weapons of choice are an emery board and liquid glue. It takes alot of filing and test fitting to get the filler piece to match the hole. I tend to stop when the filler fits snug without warping. I push the filler panel in from the bottom so that it's as level as possible with the underside of the hood. It's easier to level the topside and if an putty is necessary it will be used on the underside where it's less likely to be seen.
After just a few minutes with the emery board the topside is ready to be primed. File the underside smooth and if necessary, take a piece of scrap plastic with a straight edge to it to use as a spreader, and add some two part epoxy filler or putty of choice. I use 3M spot filler. This method should leave you using a minimum of filler if any at all. This whole project took 45 minutes including writing this.
Edited by Futurabat, 22 October 2012 - 05:46 PM.