After the first pass with the scrubby sponge, respray the letters and let it sit for a minute or two. Then hit it again. This pic is after the second pass with the scrubby sponge. This was a simple dishwashing sponge with the white nylon pad on it. Not a green scotchbrite pad.
http://www.hotboatpics.com/pics/data...04_029-med.jpg
After that pass I then used the plastic putty knife to work the stubborn areas. It was interesting that some areas were much harder to remove than others. Probably the prep work makes the difference here.
This is after scraping and a quick wipe with a rag. Most of the paint is gone now, and it will only need a final cleaning.
http://www.hotboatpics.com/pics/data...04_030-med.jpg
The last pass and it is all gone. Work time probably took about 20 minutes including my private time with the Saint Pauli Girl. It shined up nicely. I think a touch up with a polish wax would be the next step. But of course I will need to paint on the new numbers too....Here is the final product.
http://www.hotboatpics.com/pics/data...terpic-med.jpg
Not too difficult and the results were great. No fiberglass damage, and the painted on numbering is gone.
Here is the stuff I used. I think it was about $5.00 and the putty knife was 65 cents..
http://www.hotboatpics.com/pics/data...04_032-med.jpg