I just did it to a 57/08, it was mostly easy. it only creates some apparent brightness, I don't think the EQ changes very much, a little bit more upper mids. but the string attack and the clarity was very nice improvement, very noticeable especially low and mid gain. there's an extra level of raw grind very nice, I highly recommend no cover I think it's superior tone wise, just a little more edge, of course for certain pedals and gain settings it becomes less important.
to remove the pickup cover, I started to heat it up with a soldering station, seemed like it was taking wway too long to heat the entire mass, the pickup started getting hot, I could see some of the wax melting, so I took a brand-new razor blade and stuck it in there to try and scrape some of the wax out of the edge, and I noticed I was making a little bit of a dent in the solder, so I just kept cutting the solder joint rocking back and forth making sure not to cut the pickup wind, it probably took two minutes I stayed as close to the outer surface of the pickup cover, so essentially I did not need to heat it up, you can cut solder with a very sharp razor blade pretty easily. just don't cut your fingers. it also seems if you melt the solder you run the risk of it flowing or leaking into the pickup windings.
but if you want brighter, definitely try some different pickups, again probably with no cover.