Rudy,
Sure you can paint an aluminum intake. I've done a few.... Here's a photo of one i did about 5 years ago (a little dusty). I used good quality car paint that i had left over. Probably overkill but i used self-etching primer and ditzler enamel. We wanted a stock looking engine. Notice that edelbrock has been grinded off.
Try to avoid stripping paint and repainting the entire engine compartment, especially if the paint sticks well. It's amazing the type of results you can acheive by touching up chips, color sanding and a little rubbing compound.
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