I am in the process of sanding a shelf(that has not ever been stained) and applying polyurethane. After sanding and then staining the wood, I applied a coat of polyurethane over the stain. Upon the polyurethane drying, the surface of the wood became very rough. What is causing the roughness? I am assuming that it is the polyurethane that has caused this. Am I supposed to lightly sand the surface after applying the polyurethane and reapply another coat or use something else over the stain? Thanks!
1) What species of wood are you doing?
2) Oil-based stain or Water-based?
3) Oil or Water-based Poly?
4) What brands of Stain & Poly?
For shelves, I'd do 4 coats of Poly. 2 coats is only a BARE MINIMUM...IMO.
2 Coats only STARTS to look even.
If Oil Poly...usually have to wait 8-12 hours for each coat to be decently sandable. Depends on the brand and your home/shops' environment.