Do u just use a cup & stick or do u use a auto mixer?

Cup and stick. I have a mixer, but I don't like it.

Cup and "popcicle" stick.  I cut the round ends off the sticks so the squared off edge can scrape cleanly, measure with syringes every time, Use the small Dart cups (can use them over and over), warm the epoxy under running hot water to take the chill off, mix for 120 seconds (as gently as possible), gently puff on it to get bubbles to break, wait a couple minutes for more bubbles to surface and break, then apply it.  If all is done well, very few bubbles on the wraps.  Gentle puffs usually break them, a quick flash with a butane lighter if needed, but NO HEATING WITH THE LIGHTER.

Cup and stick