Step 2: Cut the 2 Liter Bottle in Half and Sand the Two Pieces.
There are many ways to cut a 2 liter in half, whatever works for you is best.
Just know the cut should be 5.25″ from the bottom.
I used a tool (cut down 2×4 with utility knife blade) to make the mark and do most of the cutting. If you are doing something else, to get an even cut you need to brace the 2 liter so it can “spin” and not move up and down in relation to the knife.
Once you have cut the 2 liter in half, you need to sand the new edges of both halves – they can be sharp and jaggy.
I used a foam sanding sponge for this. Don’t forget to do the inside rim to remove any burrs as well.
Once both halves have the edges sanded, it’s time to do a general sanding all around the outside of both halves.
For the top half, this ruffs up the surface so the paint can grip better.
For the bottom half, this gives the plastic a “frosted” look that looks better than just having it clear. This is a judgement call and you might not want to do it, but I like the frostyness so I’m sanding.
Once all the pieces have been sanding to your satisfaction, wash them off with soap and water to remove the plastic dust and any residue from what came in the 2 liter, and then set them out to dry.