Don't bother using anything on it. I did that to mine and it's faded agan within months.
Easy enough job to take off. Remove caps from wiper arms to expose the nut, then undo, carefully remove wiper arms (so as not to let them spring back onto the windscreen), then remove a bit of foam like rubber trim and it should just unclip off.
10 minute job. Easily 5 minutes if you work quickly.