I haven't taken a look at my FA5, but I'm guessing that it would be harder to do if the care is older. The spoiler on the FA5's rest on the deck lid, so it will leave sticky residue and dirt that couldn't get washed off. The longer the dirt and residue remain, the harder to remove and color-match. I'd like to do this when I get my mugen-look-a-like wing to see whether I want it on permanently or not. Nice DIY! The touch up paint worked a lot better than I thought it would