I have a hearty dislike for the use of lacquer sticks and chalks "to enhance visibility" and to the sellers who use them. Markings can be made clearly visible by varying the angle of the lighting, as a little time spent experimenting will tell you. What do you have to lose? Digital "film" is free!
As to the claim that lacquer is easily removed, I've found that it's easy to remove most of it, but all of it can be close to impossible!
Norm

The inspector's marking to the left of the front sight blade, appears to me to be a crown/S, which was assigned to a particular inspector. TH

I have found that for removing material from markings (and cleaning grips) a fine but stiff brush from a better artist supply house will do the trick. Toothbrush bristles are far too corse. I have also found acetone does not seem to harm bluing, the two together have always worked.