get an accidental to not print

[Adam Good]

Hi all,

sorry if this has been addressed already, it's hard for me to find any 
reference in the archive.

! = print the accidental manually
? = print a cautionary accidental

what about _don't_ print an accidental? like i write "cis" but don't 
want it to print the accidental?

here's the situation...

I'm notating a piece with a 32/4 time signature so Lilypond sees that 
as 32 beats to a bar. but, i have subdivisions in the piece, every 4 
beats i'll have ":" to help clean stuff up, make it readable. i use 
this:

\repeat unfold 4 { s1 \bar ":" s1 \bar ":" s1 \bar ":" s1 \bar "|" 
\break s1 \bar ":" s1 \bar ":" s1 \bar ":" s1 \bar "||" \break }

ok so now my problem is that if I have a "cis" in one " : bar : " then 
in the next bar a "c",  it prints a natural sign to cancel out the 
sharp, but I don't need that sign there, Lilypond is respecting the 
time signature. what's the best way to handle this?

I hope this all makes sense, I can't find anything in the manual that 
can help me.

thanks!

Adam Good