This question has options. How would someone go about accomplishing this goal?
Prepare the helmet for the glue.

Pick your answer from: (1). Take a bottle of helmet clean solution and spray it on a rag. Wipe the solution all over the helmet using the rag ensuring that all oil and dust are removed because any oil will cause the glue to not adhere.; (2). Take a bottle of helmet cleaning solution and pour the full thing on the helmet. Wipe the solution all over the using the rag ensuring that all oil and dust are removed because any oil will cause the glue to not adhere.;
(1).