defining tcsh "complete" exclusions

I use the tcsh and the auto-complete feature is very handy especially for
commands in my PATH. Is there a way though to "exclude" certain specific
commands from the auto completion list?

Sometime I have a some commands stored in the ~/bin that I intend only to
be called from other scripts etc. (or are backups or work-in-progress) that
I really don't want to be auto completed on at the shell command line.

I mean I could move those elsewhere but if I could define some exclusions
by toying with "complete" it'd be great.

Any ideas?

--
Rahul