Step 5Paint and Glue
I've found that on some of the smoother parts like the barrels, it was necessary to rub the surface down with some fine sandpaper in order to get the paint to stick and hold still while drying. PVC wasn't really made to be the ideal paint surface. Rub in a horizontal direction and stand the tube on an end so that the paint sits in the scratches instead of running down.
When everything is dry, glue the barrels onto the gun in an evenly-spaced manner. I think a good technique for this is to glue them on opposite ends, each pole at a time. This way you can estimate more easily half-distances along the circumference of the arm-pipe (which is why the number 16 worked well for me). Allow a small gap in between each barrel. Too many barrels, and you won't be able to fit them all on the gun! Make sure they are even, at least on the front end of the gun, and hanging over about an inch. The effect will be ruined if they aren't even! If the barrels aren't all the exact same length (as mine were not), the back ends can be a bit uneven, as people mostly look at the front end.
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