I started painting the OSB in my shop addition. My friend at the Ace hardware store convinced me to try a different primer rather than Kilz. She said the fumes would be overwelming and there are better alternatives and she was right.
Per my friends' recommendation, I used Royal stain blocking primer which is an acrylic latex made for slippery surfaces and to hide stains. It was thicker than regular top coat. She explained that the issue with the paint on OSB is it bleeds through regular primer and through paint. The acrylic latex actually seals the paint so it won't bleed through. I had some old top coat paint to use on the walls in a can that was never opened but labeled 1996. It stirred well and cured fine on my trial piece, so I put this paint on a sort section of wall. You could see the writing under the primer, but when I applied the top coat, the print covered. It was still covered when the paint dried a few hours later.
This lady is very smart. She knows more about plumbing and electrical than most store owners. The store was owned by her dad and uncle. Her dad and uncle split the business - her uncle took the contracting portion of the business and her dad took the store. When her dad died, she and her brother took over the business. She has since sold her part of the business to her brother but still works for him. When he is not there, she is in charge.
Arent small towns cool. Everyone tends to know this type of history - or is that everyone's business.
PS - Pictures tomorrow.