A low profile medical lens protector for a medical viewing device having a given diameter, comprising: a rotatable view-through element; a motor which rotates said view-through element; and a housing enclosing said view-through element and said motor, characterized in that said housing has an outer diameter less than 10 mm greater than said given diameter. Each skirt wall extends over a partial region of the periphery of the piston or piston head. An improved shaving experience is achieved through use of the dimethyl etherhydrocarbon propellant, fatty alcohol and high level of hydrophobic emollient. For example, one or more sub-apertures are not used where temperature does not rise above certain threshold or tissue displacement is weak, such as associated with intervening bone or attenuating tissue. The hydrous kaolin pigment is produced by a process comprising: a) forming an aqueous suspension of a hydrous kaolin clay; b) forming a primary product by subjecting the suspension to classification or a combination of classification and griding; c), separating the kaolin from impurities by selective flocculation; and d) defining the separated kaolin.