Both spray adhesive and double sided tape will work, but I like the 3M spray adhesive method better.
After cleaning both surfaces mask off the area that your going to spray on the guitar with blue masking tape and paper so you don't spray where you don't want it.
Chris noted that you have to be precise when sticking the FB down. One trick to help help locate the FB (depending on the thickness of the FB) where you want it is to use what are called slip sticks (something thin like popsicle sticks will work) laid perpendicular across the area before you stick. They hold the FB off the surface so you can locate the FB where you want it. When you have everything lined up you can push the FB down in a couple of small spots to lightly attach it and determine if it's properly located. Push the FB down along one of the sticks and slip the stick out. Work your way along the FB removing the sticks as you go. Always start in the center and push the air bubbles towards the edge. With that said its lots easier to stick it freehand but be careful.
If you chose to use double stick tape make sure you get the best your money can buy. I love the 3M VHB product in the link below:
https://www.uline.com/Product/Detail/S- ... gIpofD_BwE
Although it's very pricey, it the best money can buy. Once something is stuck down with this tape it's not coming up. Another option could be this stuff that I haven't used before (much more reasonable pricewise):
https://www.amazon.com/Super-Strength-M ... two=&hvqmt
Jack and Bill,
Do you guys have a double stick tape you prefer?
If you use double stick tape I recommend you push down in the center and smooth it down to the outer edge. That way you remove any bubbles that could be trapped in under the FB.
