here is the shavings i got with 10 strokes from a card scraper. is this what im looking for?
scraper_shavings.JPG
also heres some pics of a scraper jig i made. its just a 2x4 with a hole in the middle for a bolt that i threaded through and 4 screws holding the edge of the scraper. seems to work good
scraper_jig_front.JPG
scraper_jig_back.JPG