[R-390] Paint & Letter fill

[Tom Frobase]

I have been using the inexpensive stainless steel brushes from Harbor
Freight.  Once the solvent loosens the filler I circle the wire brush
around the engraving with moderate to low pressure, making sure to keep the
bristles perpendicular to the surface.  It does an effective job pulling
the old stuff out.  Once the bristles are bent throw away the brush.

I also use a dry Stainless brush prior to final cleaning for prep, the
stainless brush breaks the oxidation up and helps the paint stick better
... tom, N3LLL