Be VERY careful blasting any engine components!
If you blast anywhere that has 'internal access' it can ruin your engine. Not sure about bead media but sand is def a problem. The media embeds into the wall and comes off in your oil. Just be careful you mask off the undersurface, breather holes etc.
I know at least two people who have ruined their whole engine by blasting rocker covers or sumps like that!
So just be careful!
Mopar Performance Valve Covers
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