Build Instructions

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• 1

  Prep the exterior

  For this step, just get some isopropyl alcohol and clean the exterior really, really well.

• 2

  Soak the tumbler in an acetone burrito

  Clean the tumbler's exterior with isopropyl alcohol, and lay out enough aluminum foil to cover the tumbler like a burrito. Lay a shop towel or paper towel on the foil, and saturate the shop towel in acetone; it needs to be pretty wet. Tightly roll the towel around the tumbler and then roll that tightly in the aluminum foil, and set a 20-minute timer.

• 3

  Remove the old finish

  In about 20 minutes, pull the tumbler out of the burrito, and retain the acetone-soaked towels (we can reuse them for paint prep). Use a plastic scraper to remove the bulk of the paint (I used one that came pre-loaded in my 3D printer), and an awl or razor blade to remove the small bits in cracks/joints or small parts.

  When you've got all of the finish off, scuff the surface with a Scotchbrite pad, and make sure you get any surface etching out. Clean the exterior of the tumbler again with the acetone towels to make sure there's no residue.

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