/cgl/ - Cosplay & EGL

Hello /cgl/, first time poster here. Sorry to add to the slew of halloween newfags but here's a problem I've been trying to solve through google searches and looking through the various threads. I'll be patient with the responses and am fully aware that my costume idea wont be Hollywood quality and all that but im sure you guys can help me.

In a couple weeks, I'll be participating in a Halloween-themed motorcycle charity ride. It will consist mostly of sport bikes stunting (wheelies, stoppies, drifiting, etc) and very little freeway riding since we are going to be riding in our costumes and dont want them to get blown apart. My idea is to go as a devil/demon. I've already got an awesome pair of wings, tail, and pitchfork but all I need now are an elaborate pair of horns to put on my helmet. I want them to be BIG. The best idea of what I'm looking for is the horns on Loki's helmet from the movie Avengers. I've looked through some tutorials and already have some good ideas on how to make those (but would love any tips you guys would have as to what I should use to make them), but now heres my question:

What would be the best way to attach these big horns to my helmet that will ensure they remain attached throughout the ride but at the same time be able to remove them from my helmet after Halloween without ruining the finish/paint on my helmet? Is there some kind of sticky pads, double-sided tape, suction cups, glue, etc. that will create a strong enough bond but at the same time be (relatively) easy to remove from my helmet and not leave any lasting marks or damage? Since Im sure your answer will depend on what the horns are going to be made of, I havent yet started on the horns so any suggestions on what kind of material the horns should be made out of would be great too.

More info and details will be provided if you need them.
>Pic related, my helmet and the kind of horns I was thinking of.