if youve never installed full overlays or large stickers... the easiest way is to use a light soap and water mixture, not to much soap, and spray to clean then wipe dry, then spray the surface again once youre ready to apply overlay... the reason for doing this is that way you can move the piece around and not have huge bubbles... if you do have bubbles the easiest way to remove them is with a laminated card of some sort (i used my old ID card) then just smooth out the bubbles, be carefull when doing this because the overlay can and will shift so just take your time, once youve gotten it looking the way you want it then let it dry and all is good.... oh yeah i forgot to mention if you see any trapped water then smooth it out as well it could affect the glue on the overlays... good luck and post pics when youre done!