Available in an array of 'profiles' outlined below, scrapers have gotten themselves something of a bad rep over the years, being outcasts of the turning tools world with veterans saying they are 'for those whom are unable to get a solid gouge finish' or that they are for the 'amateur'. Quite frankly, this is as far from the truth as you can get.
Let's first dispel the most common misunderstanding - a scraper is still a cutting tool! Sharpened appropriately, a scraper will have paper thin shaving flying from your work, leaving you with a consistent, smooth, flowing form.
Personally, I wouldn’t be without my heavy duty bowl scrapers, they still take skill and control to use as does any tool, yet they serve a purpose which nothing else can compete with.
And that brings me to my final point, scrapers should always be substantial. By that I mean they should have a good depth of material to counter the forces exerted upon them, otherwise I suggest you browse the texturing tools section of the website for a similar chatter tool effect. For internal work, always use the largest radian you can get away with and always try to select a tool at least 3/8" thick.