🚀 go-pugleaf

I posted a picture to a.b.p.m called B24-nose.jpg.  If one looks closely
at this picture
you can see where the artwork was painted over rivets.  What is the best way to remove
them.  I have used Microsoft Paintbrush to copy a small region from near each rivet
onto the rivet to mask it.  Is there a better way?  Bear in mind that this image
will be made into a decal about 4 inches square.

The second thing that I have to do to this picture is to selectively colorize it to
add the flesh tones where appropriate (the model is wearing a white bathing suit that
must remain white).  I have used pgmtoppm to colorize the entire image quite
successfully.  I get the effect I want where the flesh color is "painted" on and
modified by the grayscale image.  Is there a better way to selectively colorize than
to create a series of completely black or white masks for each portion of the
image and use pgmtoppm to colorize some of them 
and then use ppmarith to reassemble the image?