Solution for problem while spraying hollow forms.

I've always had a problem when spraying hollow forms. I get turbulence around the opening that results in a lot of pebbling around the opening. Varying the spray angle has helped, but not gotten rid of the problem. The fact that one must be very careful when wet sanding near the edge makes it even worse.

I've been thinking about trying this for a while. So yesterday I chucked a small piece of scrap in the lathe and made a small plug to fit snugly in the opening. I drilled a small hole in the center to thread a screw into after spraying, to facilitate removal of the plug.

It worked great. Got a nice smooth finish all the way across the top of the HF. I may not be the first to try this, but just thought I would share.



Here's the HF in my "spray booth", the top of my garbage can outside. I picked up a utility turntable from the borg and mounted it on a 2x6. Put a round piece of scrap on top to make a nice rotatable platform for spraying. Works much better than trying to hold it with a finger in the opening while spraying.

Looks like you nailed it with that fix. Oh and nice looking hollow form!