Robert, The barnacle remains are called basal plates. If you are concerned about over sanding than take a look at Barnacle Buster. You spray it on, let it devolve the basal plates, and wash it off. This stuff is great, but you need to keep it wet.
Here are two links providing info. The first one is a write up in Practical Sailor on using Barnacle Buster in a "Barnacle Remover Test “. The second info link, is a brochure. http://www.practical-sailor.com/issues/33_5/chandlery/5439-1.html https://www.jamestowndistributors.com/userportal/pdfs/Trac_Ecological/TDS_Barnacle_Buster_2011.pdf - Paul E. 1981 C&C 38 Landfall S/V Johanna Rose Carrabelle, FL http://svjohannarose.blogspot.com/ > On Oct 22, 2015, at 6:41 PM, cnc-list-requ...@cnc-list.com wrote: > > > Date: Thu, 22 Oct 2015 16:11:01 -0300 > From: robert <robertabb...@eastlink.ca <mailto:robertabb...@eastlink.ca>> > To: cnc-list@cnc-list.com <mailto:cnc-list@cnc-list.com> > Subject: Stus-List Anti-fouling paint > Message-ID: <562934c5.7040...@eastlink.ca > <mailto:562934c5.7040...@eastlink.ca>> > Content-Type: text/plain; charset=windows-1252; format=flowed > > For the past 4 sailing seasons, I have used Micron 66....the first 3 > seasons/haulouts, the bottom was void of any marine growth, and no > slime.....didn't even need a pressure wash. > > This haulout (season #4), the bottom was infested with barnacles....not > a few scattered around, a significant number all over....I wet sanded, > which removed the most of the little critters (and a lot of the 66) but > there are still traces of the 'little critters'. Not sure if I will > sand them out completely or simply paint over them next Spring. > > Anybody have this problem and how did you finally deal with it?
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