I do do it occasionally, but only if it backs up a point being discussed or something similar. Sometimes I just put a link if it's not critical to add a photo for the discussion. I do try to be respectful of the builder ... it's his/her showcase.
I use Testors 3507AT Liquid Cement for jobs I want a good bond, like the dismal tube glue we all used ... no strings attached. A liquid glue, like Ambroid or TX-7 is also very good where it will flow into a tight joint. (sorry, my spelling bad and can't run down to check right now) You should also have a medium CA glue. It is gel constancy and stays where you put it and gives you time to place next piece with slower curing time. I have never had any luck with thin super glue. It is a pain to apply, cures too face and the tube is dried up the next time I go to use. I like the Zap A Gap because it stays liquid to the end of the bottle! The links are just for your reference to see what I'm talking about.
There are many models on here with custom upholstery that should give you ideas. I would use some plastic strips and round the edges before gluing to a base made from anything .. plastic best so you can glue the strips easily. I've uses thin half round strips to tuck n roll, but for wide flat pleats you have to use flat strips. You have plenty of strips available to pick from. You'll have to use strips thin enough to allow then to wrap around the seat tops. I did a google search and this should do it for ya. ... http://www.modelcarsmag.com/forums/topic/85175-new-tuckn-roll-interiors/ This should look cool .. be sure to let us see!!