First, I have no experience with case coloring so this question may not be very smart, but...
Why is everyone concerned with 'polishng' before a receiver is case colored? Polishing seems to be the cause of a lot of problems with loss of definition and engraving sharpness, so why do it at all?
What would a receiver look like if it were just cleaned without removing the remnants of the old color then stuck in the oven?
OK, if it would look crummy than why not blast the receiver? There are about a million abrasives (walnut shells, baking powde, etc.r) out there, there has to be one that would prep the reciever for case coloring without removing any metal.
