[1chanc3]

Thanks all for your input.
My spoiler hasn't arrived yet but based on replies here, previous threads, and other online advice, I think I will wipe it down with alcohol first and align it. Then use some kind of putty to get the corners set. Adhere the spoiler using the attached 3M sticker and then use painters tape to secure it and then remove the putty. The tape would hold it down over night.
Thoughts?