From high to low....

 Long time ago I put some Keelguard on her, turned out they had a bad batch and it started peeling off. Good news was that they sent me a replacement Keelguard for free, bad news was that I had to get rid of it all. 

Tried it by had with a plastic scraper for a while, but quickly tired of it.

They also recommend a fancy spray to remove the glue, or MEK, or acetone. I used one can of the $23 fancy spray, then used acetone. The fancy spray said it was "extremly flammable", and one whiff told me I needed to use it outside. Should have saved my money, the acetone took the glue right off. Waited for a couple hot days so the glue would be softer, then went at it. Even with a face shield and safety glasses I did get a bit of the fancy spray in my eye once, glad there was a hose nearby to give it a good long flushing out. I can see clearly now, the crud is gone....

Then it was time to reapply the new strip.

The compound curve at the front tip gave me trouble on the first one, so I vacuum bagged this one for a few hours.