Surface Preparation/Polishing Materials—00 grade or
finer steel wool; silicon carbide grit paper or cloth of varying
degrees of fineness including 65-μm grade (220-grit CAMIgrade
or P220 FEPA-grade); also a supply of 105-μm (120-grit
to 150-grit CAMI-grade or P120 to P150 FEPA-grade) size
silicon carbide grain or powder and absorbent cotton. A
commercial grade is suitable, but pharmaceutical grade cotton
wool is most commonly available and is acceptable.