| I suggest using a new blade or one
with very little wear so you get a good edge. A dull
blade also tends to "pull" the plastic from under
the metal edge and you could get a slight curve that will show
up when you try to assemble the chimney.
A good cutting mat will protect the surface you are working
on. (Any wonder how many relationships have ended over
"modeling scars" on the table tops!)
The mat will also extend the life of your blades. |
