a) they already ceramic coated. Some better than others. Some actually had a more matte finish to them
b) those heel guards polish up like that because they are all chrome plated from the factory, they just didint finish the last step and polish the chrome. The mufflers are steel, not gonna polish that.
best advice: get some rubbing compound and some polishing compound and some towels and clean it up best you can. If you really want a clean look- have it recoated- as suggested above, it's not expensive. You can choose to do a satin black as pictured, or go with a shiny silver like what you're talking about trying to achieve.