attaching

I have a Chrome Surround for my centre grill to fit today and was wandering what is best to stick it on with? Do I need to "prime" the existing plastic before hand to get a good bond? .G.

Does anyone have any ideas for how I can get my Parrott CK3100 to stay stuck to the dash board?!! The sticky pads that came with it were next to useless so I used number plate pads which worked ok until the recent hot weather came along. I've done a search and found that some people have...