Does the stepper work with clos methods?

I see that you can trace generic functions and specific methods.
However, apparently, you can't untrace specific methods with the same
syntax.  Can you untrace a specific method?

Being new to acl and lisp in general, I'd be interested in your
descriptions of development and debug work patterns.  I'm coming from
9 years of C/C++.  When I think debugger, I think gdb.  In my initial
look at the acl environment, I'm seeing something I would describe as
relatively primitive.  Mind you, I may simply be lacking the
appropriate, informed perspective.

Do any of you use Marc Merten's lisp debug package?  It seems to
provide a general facility that includes stepping (
http://sunsite.unc.edu/pub/Linux/devel/lang/lisp/lispdebug-0.9.1.tgz).
I'm going to test that shortly, but was wondering if there were a
similar acl native facility.

Any general wisdom about debugging in the acl environment would be
welcome.  I've read the debugging.html.

Thanks alot.

-- 
John M. Adams