Sandpaper for a model railroad

I was thinking the OP wanted to sand plastic or some think like that to get a smooth finish. So yes depending on what you where going to do with the sand paper would decide what type to use.

For what he is trying to do, asuming it is raw wood, is urathane it first, then sand as that will help glue the fibers together, otherwize on a soft wood, you could sand forever and new splinters could occur.

Yes, I agree. The urethane kinda locks the fuzzies into the matrix and then the sandpaper shears them off cleanly.

Robert

That might be a good idea using urethane, and than sanding the wood. Since I had dogs there drool will stop the cracking and other problems that might occur.

Such is our typical topic here at MR Forums and others have to spend a day or two interrogating the OP to find out enough detail to help the poor sod.

Lesson here: OP’s please post some background information - you’ll get help a heck of a lot sooner that way. Just sayin…