It was bad, with a film of uv hardened crud. I used a blade ( swiss army knife ) to remove the crud, took an effort to do it. Then rubbed it down with sandpaper 80 grit then 600 grit, then a paste of Jif.
After that polished it a number of times.
Was it difficult? No but took a time to do it. About a week but when you live on the boat time is not an issue. The blade was the hardest on my wrists, at 73 you take your time, couple of feet a day.
But it's worth it in the end.
Odysseus
Bav 38