"Grafting"? That is a new term for me, as far as cars go. I have primed a grill, cooked on a grill, caught the patio on fire with one, but "grafting"?
i have some stuff i got at a swap meet. it is for repairing plastic, rubber abd metal. if i can find it i will post the name. i took a busted underdash tray and repaired it. ask dan hines how it is holding up ...frank...
Looks to be part of a lathe. As far as the grille goes, my dad bought some stuff from O'Reilly Auto Parts to repair rubber bumper covers on newer cars, and I know it would work great to fix a plastic grille. Probably about any 2 part epoxy would work fine.
Keep in mind model glue melts the plastic together before it sets. If you are not repairing a section of the grill that is load bearing Testors might work ..
I have a guy that WELDS Plastic.. uses a filler rod made out of plastic and just V,s out the crack and fills it in and then just sands a bit and its ready for paint.. I sold some repaired grilles at last years round-up .. every1 liked the job.. will be coming to round-up with a comet and a mav grilles that have been repaired that way..
There is a 2 part epoxy called "PlasticWeld" that may work. I've used it on other plastics with success.
By grafting, I'm guessing you mean taking two broken grills and making one good one out of them. I have repaired grills that have missing slates or broken end tabs by using a two part epoxy we have. The tubes are so bent and smeared up I can barely read the part numbers on them anymore. It's made by 3M. The stuff is a dark grey when mixed together and smells like rotten eggs, but when it dries the parts are stuck together forever. It can be sanded and painted too. The grill in my 77' Maverick had several missing slates in it. I took slates from a wrecked grill, sanded them down so they would fit in my grill, and used the epoxy to hold it all together. That was 7 years ago and you can't tell the grill was ever broken. I'll try to get the part numbers off the tubes when I get up to the shop.
I fixed my grill in high school with chewing gum and putty knife! Just rolled it into the needed area, used putty knife to flatten it out, painted....sold car 3 years later, still could not tell where the grill was messed up.