08-05-2016, 09:10 PM
tis always better to have clean surfaces to mate to. Paint, or powder coat is generically soft compared to alloy, and thus will squish. So remove before installation for best results

Not always Grumpy!!
306 Cabby SE, 2.0l 16v
To the optimist, the glass is half full. To the pessimist, the glass is half empty. To the engineer, the glass is twice as big as it needs to be!