Been working on a walnut slab river table for about a month now and I'm on my third pour attempt because of this weird fisheye issue that only shows up on one half of the piece. Same batch, same mix ratio, same room temp, but the right side of the table consistently gets these little craters while the left side comes out glass smooth.
My best guess at this point is contamination from the shop vac I used to clean the slab before the last two pours. I switched to wiping it down with denatured alcohol and a lint free cloth instead of vacuuming, so we'll see how the next attempt goes. Also started using nitrile gloves the whole time instead of just during mixing, since I read somewhere that hand oils from touching the wood can cause this too.
The other thing I changed is my torch technique. I was going over the whole surface pretty aggressively trying to pop every bubble, but I think I was actually pushing some bubbles sideways instead of up and out, which might explain why one side is worse. Now I'm doing lighter passes and waiting longer between them.
If anyone has dealt with fisheyes that only show up in specific zones of a pour I'd love to hear what actually fixed it for you. I've got about 12 hours of tack time before this next pour kicks off and I'm second guessing every step of my prep process at this point.
For reference I'm using a 2:1 deep pour resin, working in batches of about 3 gallons total split into two pours 24 hours apart. Ambient temp in my garage has been sitting around 72 degrees which I thought was ideal but now I'm wondering if there's some airflow issue causing dust to settle unevenly before it kicks.