I e do e aluminum color as a base and a lead on top before. The results are good when the paint is of the highest heat resistance you can get. 2 problem still exist though and they would be actual color of the aluminum paint. It may not be the shade/huge your looking for. The other is it is still paint. And with it come all of its problems. Short or long term fade, chip, peel and discolor from what lurks beneath the hood.
Paint wise, I use the MoPar engine paint. Good strong and tuff stuff that lasts. Use the most extreme rated high temp clear you can find to finish it up with, no matter the brand base which again shod be the most extreme high temp kind.
Save your bucks to power coat later. It is a good and wise long term investment.