said by dolphins:Were you using a water based poly?
No -- I was using Glidden Porch & Floor Polyurethane Oil Gloss.
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www.duspec.com/datasheet ··· atasheetNote -- in the data sheet it states "Do not thin".
It was hard finding information regarding adding Penetrol but found the following
"To Improve Varnish Work
Add 20 to 30% Penetrol Wood Oil to all oil and alkyd based varnish
as well as 1-part polyurethanes. The varnish will become more flexible,
resist cracking and peeling and will flow without leaving brush marks.
NOT SUITABLE IN 2-PART POLYURETHANES OR EPOXIES."
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floodaustralia.net/broch ··· doil.pdfI rarely ever thin oil based paint, preferring the workability of Penetrol but until I found the above I was uncertain if it could be added to Polyurethane. Penetrol is not a thinner -- it is a conditioner.