Multiple people that tried to use scrapers with varying success. Or at least this is what I've heard around the web and from other people I've talked to. I remember last years class @ Rosewood that we spent some time sharpening and using the card scraper with pretty good success. Pretty amazing what a small burr can do.
If you only get dust, you did not do a good job and sharpening the scraper. I was at the Montreal Hand tool event from Lie Nielsen and Deneb Puchalski did a demo on sharpening the scraper which was a simple procedure that takes about 5 minutes on water stones.
Tried it tonight and it works. Also had a chance to see in operation a large scraping plane and see the finish that it leaves on a board. Always was hesitant on buying one of those and I now know what to expect. Not sure yet I have the work that warrants this type of plane.
But I now know what it can do