It took me about 3 hours, but it's my hobby not my job. I take my time, drink coffee, admire the parts, etc.

I soaked my cover in hot carb cleaner to take most of it off and then bead blasted. There will be imperfections in the casting but in my case they where near the #6 cyl. so I ended up just clearing the cover with a matt clear. The raw magnesium looks like business.

Jorg