Ignoring control-F's in Lisp source files

[Charles Rich <rich@wheaties.ai.mit.edu>]

Has anyone written, or know of, an appropriate Common Lisp readtable
definition that will ignore font change characters in a Lisp source file?
For example the Symbolics Styled-Lisp facility inserts a lot
of font changes.  Note that the control-F can be followed not only by
a single character, but sometimes by a list or other complex expression.

	       -CR

P.S. To Symbolics:  What exactly can follow a control-F?  Also, it
wouldn't be a bad idea for Symbolics to provide such a Common Lisp
readtable definition to enhance portability of code written on Lispms.

P.P.S. If we had such a facility, it would be a useful site customization,
as it would assist using the same Common Lisp source files in both
worlds.