Here's my way: Make a midnight raid to your local elementary school and empty all the pencil sharpeners into a brown paper bag, plastic won't work. Then all you have to do is seperate the black stuff from the brown, easy as tipping a kayak!

Of coarse if you don't have a local school, and judging by the spelling on this forum that must often be the case, you take your mechanical pencil, we ain't gonna waste time sharpening some non-rolling rectangular sectioned carpenters mistake maker, no, we're gonna click-click our way to to a slippy slidy graphite protected killer kayak. Yes sir, we're gonna break rocks and take barnicle names. So, picture this, this page in your coloring book is showing a a big white polar bear, and a fiesty old snow covered walrus and some kind of far north indiginous person in a white parka, except it's night, and more than that it's one of those 4 month long may never see another photon again night! So, draw that picture on your kayak hull with the pencil, then take 2 epoxy and call me in the morning.