RE: [a/s] Micro Scratches

["Loren Peterson" <loren@xxxxxxxxxxxxxxxxxx>]

I disagree.

On my Airstream there is a definite "grain" to the aluminum, but
using a product that has too harsh an abrasive and going with
the "grain" will still dull the finish.  You can use products such
as these, but need to follow them up with a milder abrasive,
then a polish. (Note:  This is only if your clearcoat finish is damaged:
If your finish is new or in good condition you won't need to use an
abrasive polish such as Walbernize anyway)

Think of it as sanding wood.  You can start with coarse grits, but
need to work your way up to a really fine grit in order to get
a smooth surface.  And only smooth surfaces will give you deep
gloss.

In the professional automotive detail world, and especially for body shop
polishes, manufacturers generally rate their polish according to the "grit"
of sand scratch the polish compares to.  For instance, an 800 grit polish
will remove 800 grit sand scratches (fairly coarse), and a 1500 grit polish
will remove 1500 grit sand scratches, etc.  2000 grit is about as high as
it goes.

I think it oversimplifies it to say simply that "following the grain" can
help
you avoid scratching to the finish.  The scratches are there, preventing you
from achieving high gloss, you just can't see them as well because they are
hidden by the "grain" of the aluminum.

Loren