> ...two deep supers...
> ...I want to get rid of all 18 frames of badly drawn comb

There's a big clue - "18".

I'm going to guess that you have a hive where 9 frames of
bare foundation were placed in a 10 frame hive.  This is a
classic recipe for a royal mess.

> and replace with a combination of good drawn comb and foundation.

Cut away only what you must to allow the frames to be removed,
and insert a 10th frame into each box.  If the bees want to draw
comb in mid-summer, they will.  If not, they will at least "clean
up" at bit, and have a chance to draw comb properly next spring.

                jim  (Some don't like my personality.
                  That's OK, I have 4 others.)

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