check w/ your local powder coater. IMHO, sand blasting may not be enough. I have alot of my work powder coated. I've learned, the rougher the surface, the better the adhesion. The chrome pieces may require some scuffing/sanding
+1, ask the place doing the powder coating what they recommend.
They'll take the weight/thickness of the piece, it's shape & construction into consideration as well as what it's used for.
Handlebars & exhaust might both be chrome but the prep on one is nothing like the other.
If they say blast it, I bet it's not just to scuff it up.
I bet they blast the chrome right off the piece if they can.
That's what I usually did when I worked at a commercial blasting shop.