At long last today I decided it was time to finish the clearcoat on my SF2 playfield.

I spent my spare time over the last few days setting up my spray booth. The last time I tried to paint in my shop, I think I got more paint in my shop than on my playfield.

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I mixed my paint like I have in the past, using Omni mc730 clear with mh738 hardener and mr295 reducer. It was a nice 65 degrees in the shop when I started painting.

I cleaned my playfield with naphtha (camping fuel here in California) and set my gun up for a heavy coat.

Then disaster stuck... Fisheye, and in a big way.
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So what caused the contamination? I don't think it was the compressor, the air filters are almost new. My best working theory right now, is that the rags are used to clean the playfield were contaminated. I use recycled rags that have been washed. I might have picked up one that was used to wax a play field.

Does anyone else have any suggestions for avoiding fisheye in the future?

For now, it looks like I will have to start sanding it back down in a day or two.

I forgot the activator is temperature sensitive. It was 65 to 70 degrees in the shop when I sprayed. The 738 activator I used is intended for 75-90 degrees... Would this cause the issue I am seeing?

My compressor has an oil trap/water trap at the pressure regulator... It is empty. I could put another water trap on my spray gun.

This is the sandpaper used exclusively on the playfield.

https://www.amazon.com/gp/product/B06XF4QYVP/ref=oh_aui_detailpage_o05_s00

It is a silicone carbide based sand paper. I wonder if this is part of my problem...

Considering the 3m stuff is also uses silicon carbide abrasive. I think the silicone may indeed be a typo in the description of the sand paper I have been using.

I bought the fuel over a year ago. It seems to act like naphtha. It evaporates very quickly and leaves no residue behind. What other options do we have in California?

I will get my droppers out this evening. This method sounds like the best way to salvage the coating I have already put on.

BTW, this was not the first coat of clear I have put on this playfield. This was supposed to be my 3rd and final coat. None of the other coats have done this.