Injection Mold Cleaning

[moldcleaner]

I need to attempt to remove rust from a mold cavity. Steel is hardened 420SS and the EDM texture in the cavity is VDI-24. Cavity is approximately 1 1/4" diameter. What would be the best media to use for this??

[emkayss]

Using a Medium-Fine (#10) Glass Bead at a low pressure should remove the rust with minimal impact on the steel surface.