@edsnova posted:If you want to get it powdered, then for sure keep scrubbing. Your powder coater will appreciate it.
It’s a rare day that I contradict Ed, but if you’re going to get it coated don’t bother.
AFAIK, there isn’t a powder/ceramic coater out there that won’t insist on blasting pre-coat. ANY contaminant in the process, including oil from your hands, will ruin the coat and possibly anything else in the same batch in the oven. It’s built into their price. And no matter how clean your piece, they’re going to do it anyway.
And I’ll second Stan’s advice, and go a step further. I found an old blast cabinet at a yard sale for $5. I added a $50 ACE soda blaster and came up with a killer little setup that’s great for smallish alloy parts. It puts a great finish on anything and, if it matters, a coat of Eastwood’s Diamond Coat will keep that “just blasted” finish, forever.
Here’s my intake manifolds and generator stand freshly soda blasted:
eta: I should have read the rest of the thread.