tape to lubricate your scroll saw blades, some woods such as cherry and maple tend to burn. The darkened wood is hard and next to impossible to sand away. I run into this problem every year around Christmas time. Particularly on thicker wood which compound patterns require.
I normally use Flying Dutchmen reverse blades. 90 percent of what I use are 3's and 5's. However, I have found that Pegas makes a blade called a Modified Geometry Reverse blade. It is the best blade I have found to keep wood from burning. It is better than any skip blades I have found, either Olsen or FD, for not burning. I hope this helps someone. Pegas used to advertise in SSWC and perhaps they still do. I buy mine at my local Woodcraft.
Barry