The only edge work I've done has involved applying numerous coats of dura edge or edge kote. I am experimenting with edging now since I've had to start over on the Hampton bag as the dye-prep melted my edging job. I am thinking of mixing the dura edge with matte gel medium and seeing how that works. I'll keep you updated. As far as a good leather cement, Feibing's makes an excellent product. I've tested that, E6000, and Super Glue Vinyl and Leather Adhesive and it came in at the top. I was surprised! E6000 was so close that it was really a tie. I will probably use the two together when I apply a patch to a bag I'm working on. Still waiting on the patch material to come in. I don't know how Leather Cement would work as an edging material but it's worth a shot. The leather cement is very thin so I don't think it will help with building up quickly as you are wanting to d

n the other hand, I can see the benefit of having a product that would be less visible (hide mistakes) to build up the area. You will still have to completely cover it with paint at the end though. You could do a test and put a bit of cement on a scrap of leather, let it dry, and then paint it to see what happens. I think matte gel medium is your best bet for building up quickly. It does shrink as it dries, so you may have to do a few coats but that is actually a good thing because it allows you to correct mistakes. It also dries slowly (overnight for first coat) which is another consideration. Good luck! Keep us posted!