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semi-open pored woods and air entrapment2/5
someone brought up air entrapment and i wanted to get some ideas for how to avoid this.
i'm not sure this is what i'm experiencing but we do spray a lot of walnut and walnut veneer and run into the dreaded "bubbles" without much explanation. we've been keeping a spray log and we cannot always get the same results when the humidity and temps are the same and we're doing the same things we did according to the log. the variable there is wet thickness and i'm sure we are guilt of this from time to time, but it always seems like something else is going on.
how does one semi-avoid air entrapment? spray more or heavier coats of sealer?
I've been running into these bubbles lately too. I've been told it's called solvent pop? I thought I had it solved with 10-15% retarder.
I always used a vinyl sealer for years and my tech contact says that magnasand is a laquer based sealer.
Thinking of going back to a vinyl sealer.
Hope I can fix this myself.
thinned material and fast passes for the sealer...Thinning your sealer/seal coat 15 % with butyl acetate has always worked for me.
Spray the first, maybe also the second, coats very lightly. Just barely wet the wood on the first pass, and on the second pass, spray only enough to get it to lay down well.
Like Nick said, butyl acetate is very helpful as long as it's compatible with your finish.
I like using auto grade reducer to thin