Jumble Jumble
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Speaking purely theoretically, I can imagine lacquer and tru-oil having vastly different tolerances for heat, because of the way they work.
Lacquer hardens because the solvent evaporates, whereas tru-oil hardens by reacting with oxygen in the air. So heat would totally screw with the evaporation process with lacquer, we can see that. What we'd need to know is whether heat does anything bad to the reaction between TO and oxygen. My suspicion is that it would simply speed it up, but fear and ignorance would definitely mean I would try to stop the wood getting anything other than slightly warm.
Just rigging up a parasol is probably enough, though.
As I said though, this is theoretical. The knowledge as to whether heat affects TO must be out there somewhere.
Lacquer hardens because the solvent evaporates, whereas tru-oil hardens by reacting with oxygen in the air. So heat would totally screw with the evaporation process with lacquer, we can see that. What we'd need to know is whether heat does anything bad to the reaction between TO and oxygen. My suspicion is that it would simply speed it up, but fear and ignorance would definitely mean I would try to stop the wood getting anything other than slightly warm.
Just rigging up a parasol is probably enough, though.
As I said though, this is theoretical. The knowledge as to whether heat affects TO must be out there somewhere.