You could spray them black. That's usually looks good. Or you could cut out the inside of the grill inserts and put some mesh like squarepants on here has done. I plan to do that to mine eventually too
Hi ive sprayed them matt black looks 100%better I meshed my other k11 and a member on ere took the piss but it looked better than the orginal grills.Id like to try and smooth the bumpers I don't like the raised bit on the corners.