Just to look at this a little more ... small fixes are often the most
difficult. As you sand down the newly applied material, you ultimately
hit the surrounding area and remove gelcoat there ... sometimes to the
point where the underlying darker glass surface starts to show. Except
for small chips, I always use some type of disclosure agent which shows
where I am sanding. I have also used tape to shield areas ... this can
help ... and always use the finest grit paper possible ... slower is
better. Leading edge sanding around the front radius requires feel and
wrist action ... it would be easier to explain on the phone if you want
to discuss.

KK