depens on what you use. If you are going to spray it with Line-X (used to work there), take the grill off, make sure there is no grease, oil,etc., give 'er a quick scruffing with 80 grit, and have it done while you wait. After a year or so, when ist starts to get faded looking, use this stuff called Lin-X Renew (kind of like armor all for Line-x), and it will look brand new. I recommend you spray both inside and outside of the grill so less chance of peeling, and walla- there ya go. Should cost around $50-60 or so.