RW> Just the opposite from my perspective. That dirt will crud up the paint,
RW> requiring a cleaner to make it shine again. The Z has been in the garage
RW> gathering dust. I use a 'California Duster' to keep most of it off, but
RW> the last wax job has accumulated dust to the extent that it now clings to
RW> the paint and the duster can't remove it. Time for a good 'hand wash' and
RW> wax...Since it has been sitting outside in the Texas sunshine since
RW> January, that will make the cleaning job that much harder. Even the
RW> touchless car wash couldn't cut it.

The dirt will crud up the paint and requires some major scrubbing to get
through it all.  The first time I used the Nu-Finish, I had to really scrub
the trouble spots (the hood) where it looked like some oxidation had taken
place. The Nu-Finish was able to bring the shine and gloss look back to it.
 

I also like the fact that it lasts a long time.  

RW> 8^) When I bought the Z in 2001, it got a wash job every week. A wax job
RW> about once a month. At the time, I used Mother's Wax and a Mother's
RW> Showcar spray to keep it shiney...that's all gone now, but I still have
RW> the Mother's...

I use Mother's Chrome polish on the HD.  That stuff does a good job, too.  

RW> If you got any on your black bumper parts, you can tell when that stuff
RW> is
RW> gone just by looking. If the stain it leaves is gone, the likelyhood of
RW> what you applied to the paint will be too. At least Mother's can be
RW> washed
RW> off if you scrub long and hard enough. Not so with Nu-Finish.

I just make sure I get all the wax/polish off and don't put it in hard to
clean areas.  The downside of not being able to get the Nu-Finish off after
long periods of time if not scubbed off is probably one of the reasons that
it lasts so long as a wax.  I have never seen a standard wax last almost a
solid year.

RW> There has to be a touchless car wash in your area. Run it through once a
RW> week and it'll stay that way, for a while.

Even the scrubbing car washes wouldn't have cleaned my car, originally. 
Too much scum and oxidation on it.  After some scrubbing with the
Nu-Finish, it looks new again.  

The winter months are much more harsh on the paint than summer, given all
the salt in the winter.  I try to get that cleaned up quickly.

- Mark

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