Why and how do you white border cards?
All basic lands are white bordered ninth edition (Plains - Avon, Island - Szczudlo, Swamp - Elmore, Mountain - Avon, Forest - Avon), tokens/emblems are in white sleeves. The cube is all black bordered, double sleeved in clear ultra pros. This means if you fan a group of cards, you can see at a glance what cards have been drafted, and what were free additions. It makes it easy to strip basics and tokens at the end of the draft, which also makes it easy to check that 45 draft cards are returned.
The actual process of white bordering is easy, you need some tape and an eraser. Make sure the adhesive isn't aggressive enough to damage the card (if it is stick-unstick it on your clothes to weaken it), tape the edge of the card, just leaving the black border, then rub with the eraser until the top layer of ink lifts off. The end result looks the same as legit white-bordered cards.