Sounds like you got it licked. I put the grommets on the hinges then worked them into the body. I put dish liquid all over straight out of the bottle. (No water dilution) Slick as snot. Son does body work and has these pvc/plastic tools for glass install and the likes. Look like miniature tire tools. Different sizes. Won't scratch the paint if you slip. Mine went on fairly easy. Takes some finesse. I'm still trying to adjust the right cargo door and have had it off a number of times, getting ready to take off again. Grommets are getting much easier to work with.

Now I leave the grommets in the body and just slide the hinge into it. (2 man job)
Richard
azcornman