Sand blasting's effect on finish??

[crawdad]

I haven't done any body restoration yet, but I remember a long time ago, I had some parts on another truck of mine sand blasted. They were hidden parts and I painted them with a can, but when I finished, the part was not glossy. It was more a satin finish than anything else. A friend of mine said it was because of the sand blasting. Is he right about that? Does sand blasting cause a part to be dull in finish as opposed to one that has just been sanded? Maybe I didn't paint it right or used the wrong paint...I don't know.