i will, how much resin should i expect? let me tell you about the history of my pipe.

a long time ago my friend gave it to me for a nug. he was desperate and i had just bought an ounce, i figured, why not? but over time i have grown to love this pipe, its got a metal bowl attatched to a plastice tube, pretty basic, but it works well. when i got it i did notice that it had a large amount of resin in it, i tried to scrape it but gave up halfway through. but so far in the past few months ive smoked my half through it and a 15 sack and ive used it to smoke with many other people. so im thinking it should have a nice amount of resin, but about how much should i expect? how much resin do you guys get after scraping? also, how long does it take and what methods do you guys use?