i use a black elastick and not glued and no velcro
but my knee are good "attached" also i can use velcro in the back of the knee guard
sorry the bad pics
i used 1 inch white elastic which has been weathered to roughly match the color of the knees. snaps on the sides and velcro on the knee plate. this method works fantastically. i have yet to have one pop.
I highly recommend sewing velcro to the front of your jumpsuit at the knees and attaching the opposite piece to the inside of your knee armor. I have yet to have mine budge using this method. If you don't, they will eventually slide down unless you put them on super tight. But if you do that, the chances of them popping off increases. Of course if you want to be film accurate, don't add the velcro. You can see how the knee armor slid down on the RotJ skiff scene. :rolleyes
I'm gonna start this one about the accurate colors on all Fett's straps for the knee armor and...yes, the BUTT!!! Don't laugh about it! ( )
I think that the easiest of all is for Jango that his straps are all BLACK (I guess, I'm not a Jango fan), but about Boba Fett, I noticed that the bands in his knee armor ARE DEFINITELY WHITE and painted or weathered in grey or misted with flat black in the MoM pics.
Now, there are not many pics of Boba's...butt (except of my pics taken with the costume on...thanks Mirax ) and I can't make sure of what color exactly are painted these. I know that Tylerdurden has the right answer for this as well.
This topic came to my mind, cause when I was taking the pics with my costume, my seamdresser asked me about it, and guess what was my reaction face as an answer...:facepalm
I agree with TD. It all appears to be white. There's a possibility it was weathered/dyed/painted (as with the elastic on the boots), but on the MOM exhibits, it's just as possible that it's accumulated dirt and grime from 20 odd years of storage.