[Steve Neul]

It would be alright to use the whitewood to build with. Just be sure to watch and cut around sap pockets and seal the knots with zinsser sealcoat before painting. Often the knots bleed sap through the paint and the shellac will help.

 

[Steve Neul]

What do you mean whitewood?

It's a grade of wood known as SPF which stands for spruce, pine and fir. It's the wood they make 1x4's thru 1x12's. The only problem using it for paint grade is the knots oozing sap. If you are careful not to get a sticky one they don't usually ooze more sap than the sealcoat can block.