I did a quick warm soapy water scrub in the area, then warm water to take the soap away and then dried it really well. Stuck it where I wanted it and pressed quite a bit just to make sure it was on, now the week wait til i get to ride again lol.I let mine set overnight before I did the gocart track, just cleaned the helmet real good with alcohol and let that dry.... We use that type adhesive (the 3M) at work on our overlays... 24 hours is plenty of time for 90% (or so) full grip.
You can always tie it off with some small nylon rope if your not sure about it.
and i'll probably tether it to my chin strap with the paracord tether that's already on there.
Thanks for the input Don!