How to clean pistons?

[Kevin Trent <trentkc@domain.elided>]

I'm disassembling a 1750 for rebuild.  The pistons are carboned up, both on 
the top and on the inside.  In addition there seems to be a large amount of 
grunt in the ring grooves.  This is after the degreasing process.

In the past I've used a soft wire brush to remove the carbon from the 
piston top, but don't recall having to deal with the piston grooves or the 
underside of the piston.

Is it OK to use a air blaster with glass beads?  (yes, I will be VERY 
careful to clean residue after blasting).

I want to reuse the piston/liners - this will be a substitute engine to 
temporarily replace a 2L during its rebuild.  Won't get a lot of miles, not 
expected to last forever.

Thanks, //KCT, Powell, TN

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