Order Popcorn Do I Have To Scrape The Popcorn From My Ceiling In Order To Put Up Crown Moulding?

Do I have to scrape the popcorn from my ceiling in order to put up crown moulding? - order popcorn

I know that the scraping popcorn is complicated and time consuming, but I hear that if I do apply form components. Is there any way of making molding compounds can not scrape the popcorn off my ceiling?