BUCKTHORN_Questions_ _Answers_16_March.doc

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FY16 Dry-Dock Repair for Coast Guard Cutter BUCKTHORN
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HSCG85-16-Q-P45730
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BUCKTHORN Questions & Answers March 16, 2016

Question: (Reference WORK ITEM/S #11-13 U/W BODY PRESERVE: 3.3 Draft mark painting 2 coats of polysiloxane or silicone alkyd enamel). Is the Polysiloxane compatible with the new Anti-Abrasion coating? And if not what is to be used as a tie-coat?

Answer: In the notes section appendix A-14 in 6310, note 16, apply one coat of polysiloxane or silicone alkyd for draft marks.

Question: (Reference WORK ITEM/S # 12 CONDITION "A" 13 CONDITION "B" U/W BODY PRESERVE: 3.2.3.2 Solvent Cleaning). What is the current paint system on the vessel? Is it Anti-corrosion, Anti-Corrosion with Anti-Fouling, Or is it the Anti-Abrasion coating?

If we sand sweep blast it and then have to solvent wipe it down, What solvent is recommended? And with the recommended solvent there will not be any compatibility issue with the solvent softening/dissolving of the current paint system on the vessel, will there? And will the Anti Abrasion coating be compatible with the existing coating? If not, what is to be used as a tie coat for that application?

Answer: The current paint system on the boat cannot be found going through DD12 CFRs. But, in the standard spec 6310 appendix A-8 it calls for anti corrosive epoxy. Following manufacture directions will inform on the proper solvent.

SEE ATTACHED WARTSILA SERVICE REPORT FOR QUESTIONS ON SEALS

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