1. Never use sand paper until all the work with the edge tools is finished. Why?

2. Always sand lengthwise of the grain, otherwise you will make cross-scratches on your work.

3. On flat surfaces the sand paper should be held on a block.

The block helps to overcome the tendency of the paper to cut more on the soft than on the hard spots. On irregular shapes special blocks or the fingers must be used.

4. Never attempt to fit joints by using sand paper or a file.

Reference Work:

1. Find out how sand paper is made. How it is graded.

2. Look up the manufacture of files, how they are graded, and when and how they should be used.