Engine bay heat shield's paintable?

We paint the insulation on steam plant with heat resistant Aluminium and that works fine

 

I have repainted some on my previous F355 spider, using aluminum paint. I will need to do the covers/sheilds you have posted that protect the CV joint boots, as mine are flaking too.
I used something like this previously on the CV joint heat shields on my 355 https://www.grainger.com/product/38EM95?gclid=EAIaIQobChMI0O2k2ZLr5wIVEr3sCh1_nAsHEAkYCSABEgKNzPD_BwE&cm_mmc=PPC:+Google+PLA&ef_id=EAIaIQobChMI0O2k2ZLr5wIVEr3sCh1_nAsHEAkYCSABEgKNzPD_BwE:G:s&s_kwcid=AL!2966!3!281698275744!!!g!471129718949!

I recall I degreased them, then used a wire brush to remove loose paint and went at it. I don't remember the exact paint brand I used, but it wasn't a perfect match for whatever Ferrari uses.