The goal of sanding wood that has primer on it is to smooth down the grain that has risen while still leaving the primer intact so you do not lose the added adhesion that the primer will provide for the top coat. To sand wood with primer on it you should consider a finer grit sandpaper (like a 220 grit sand paper).
Also, can you paint over primer without sanding?
Good quality bonding primers will often state ‘no sanding is necessary‘ and will stick to glossy surfaces like glass, tile, metal etc. … The really good primers do cost a little more but are well worth it. If you use a good quality primer prior to painting with a reputable paint, sanding may not be necessary.
In this way, how long after priming can I paint?
Most latex primers dry to the touch within 30 minutes to 1 hour. But do not paint the wall until the primer dries thoroughly, which can take up to 3 hours. High humidity and cool temperatures prolongs drying times.
Is it better to wet sand or dry sand primer?
Wet sanding, which is sanding with the addition of water to act as a lubricant, is less abrasive than dry sanding, and results in a smoother finish. It’s best to wet-sand the final finish of a project. Dry sanding removes more material, and smooths rough material quickly.