So I removed the front slats covering the 5.25inch bays from the front of my case, put mesh over it and whacked a Yate Loon SM-120 fan in there to create a nice wind tunnel effect 
But as you can see, there's a lot of unsightly bare metal showing, which must also help make the fan even noisier.
My mission for you, should you choose to accept it, is what do I do with the bare metal to make it black and help noise problems, without spraypainting it black? Also, a cheap DIY filter for the mesh would be a bonus too!
Merci beaucoup in advance


But as you can see, there's a lot of unsightly bare metal showing, which must also help make the fan even noisier.
My mission for you, should you choose to accept it, is what do I do with the bare metal to make it black and help noise problems, without spraypainting it black? Also, a cheap DIY filter for the mesh would be a bonus too!
Merci beaucoup in advance