Bottom paint removal?

[martin]

I paid 150 for a guy to help me sand the bottom of my boat... I had a box of 40 grit, 80 gritand 120 grit. the bottom paint was 2-3 layers and believe it or not.. It was the finer grit that removed the paint quicker..it took us 15 hours to sand the entire bottom.. If I had the funds I would have paid to soda blast but. I didn't think 150 was to bad..He did a great job.. btw the guy is a professional cabinet sander. been doing it for 12 years