The two most common mistakes everyone makes when staining floors.
1.) Not removing all the dust
2.) Staining unevenly
It is best to finish the floor and apply a protective sealant as soon as possible after sanding the floor, preferably the same day. This protects the floor from moisture and other problems that could cause the wood grain to rise and create a rough surface. Before you begin finishing the floor, you need to be sure that it is perfectly clean and free of dust or debris. Also, carefully check for any flaws or imperfections.