Thread: Help with my horn???

You can rough them down with something pretty harsh if you are carefull then work your way through the grades of wetndry. I take them down to 1200 grit but that's only if you want a high level of polish. Something like autosol on a fast calico wheel works well for a high sheen. You can certainly thin them out if you want to change the sound a little but after years of plastic hoses, milk bottles and cupped hands Im not sure it make any difference in the field.
Crap photo but it gives an idea.