Originally Posted by
fender3x
Wow! I was blissfully unaware of the differences. I generally go with the product mfg's recommendation on grades of sandpaper to use... but just now realized that on my last couple of projects the paint was EU while the top-coat was US.
...and speaking of the mfg's recommendations. The stain I am using has different mfg recommendations for sanding depending on a number of things. All grades given here are ANSI...
They say down to 220 with open grain, 180 with closed grain woods. You may want to use 320 with endgrain. I used 400 with paulownia which is super open grain, pine or "swamp ash" may be similar.
It get's weirder if you are using all water based products... My mfg recomended to stain first, then NO sanding until the sealcoat was down. Then 320 or 400 for scuffing between coats.