logos

So I'm ready to put my V-max logos back on my side covers and might be vinyl wrapping my tank cover. What adhesive are you guys using to get those things to sit flush to the panels? I peeled off the gray sticky stuff when I took the emblems off, but I'm pretty sure it's not just 3m tape. That...

I'm repainting the bike and want to have the Yamaha logos back (bike came without them). Are the tank logos decals or are they plastic badges that have to be glued on? What do you guys recommend?