A typical finish we do on walnut is staining with Old Masters Natural Walnut stain (sprayed and wiped) and then 2 coats of a waterborne poly on top.
A fabulous finish. However a couple of times we have encountered some blotchy areas after the first coat of clear is applied. Before the clear the stain looks uniform with no visible defects. These spots or areas are now devoid of the stain.
It kind of looks like some diluted glue had seeped into the grain. But if it was glue then the stain wouldn’t have taken and have been visible prior to applying the clear.
Any ideas out there or perhaps someone has seen this as well?