Painting the bottom of a yacht

megaboater

Recruit
Joined
Oct 22, 2024
Messages
2
I bought a 2008 Princess 54 yacht.
When the Thai "masters" were preparing the bottom of the boat for painting with antifouling, they did the sanding too roughly - they erased a significant layer of gelcoat, in places down to the fiberglass and damaged the fins - fins almost all over the boat (see photo).
The "masters" then offer the following painting option:
1. International intershield No. 300 - 2 layers
2. International No. 263 - 2 layers
3. International Antifouling No. 6800 - 3 layers under the bottom, and then 4 layers around
All painting will be done outside with a roller at a temperature of 25-35 degrees and a relative humidity of 80-90%
The "masters" are going to restore the fins - fins using gelcoat.
The question is - is it necessary to restore the gelcoat or will the proposed painting scheme be enough?
If restoration is necessary, what is the best way to do it - restore the gelcoat only in places where it was worn down to the fiberglass, or roll 1-2 layers of gelcoat on the entire bottom?
 

Attachments

  • photo_1_2024-10-22_10-04-41.jpg
    photo_1_2024-10-22_10-04-41.jpg
    200.8 KB · Views: 4
  • photo_2_2024-10-22_10-04-41.jpg
    photo_2_2024-10-22_10-04-41.jpg
    125.6 KB · Views: 4
  • photo_3_2024-10-22_10-04-41.jpg
    photo_3_2024-10-22_10-04-41.jpg
    112.3 KB · Views: 4
  • photo_4_2024-10-22_10-04-41.jpg
    photo_4_2024-10-22_10-04-41.jpg
    78.5 KB · Views: 4
  • photo_5_2024-10-22_10-04-41.jpg
    photo_5_2024-10-22_10-04-41.jpg
    204.3 KB · Views: 4
  • photo_6_2024-10-22_10-04-41.jpg
    photo_6_2024-10-22_10-04-41.jpg
    107.5 KB · Views: 4
  • photo_7_2024-10-22_10-04-41.jpg
    photo_7_2024-10-22_10-04-41.jpg
    114.8 KB · Views: 4
  • photo_8_2024-10-22_10-04-41.jpg
    photo_8_2024-10-22_10-04-41.jpg
    104.8 KB · Views: 4
  • photo_9_2024-10-22_10-04-41.jpg
    photo_9_2024-10-22_10-04-41.jpg
    79.3 KB · Views: 5
  • photo_10_2024-10-22_10-04-41.jpg
    photo_10_2024-10-22_10-04-41.jpg
    127.8 KB · Views: 3
  • photo_11_2024-10-22_10-04-41.jpg
    photo_11_2024-10-22_10-04-41.jpg
    91 KB · Views: 3
  • photo_12_2024-10-22_10-04-41.jpg
    photo_12_2024-10-22_10-04-41.jpg
    80.4 KB · Views: 3
  • photo_13_2024-10-22_10-04-41.jpg
    photo_13_2024-10-22_10-04-41.jpg
    128.9 KB · Views: 3
  • photo_14_2024-10-22_10-04-41.jpg
    photo_14_2024-10-22_10-04-41.jpg
    119.2 KB · Views: 3
  • photo_15_2024-10-22_10-04-41.jpg
    photo_15_2024-10-22_10-04-41.jpg
    101.5 KB · Views: 2
  • photo_16_2024-10-22_10-04-41.jpg
    photo_16_2024-10-22_10-04-41.jpg
    86 KB · Views: 2
  • photo_2024-10-22_10-04-18.jpg
    photo_2024-10-22_10-04-18.jpg
    108.8 KB · Views: 4

Scott Danforth

Grumpy Vintage Moderator still playing with boats
Staff member
Joined
Jul 23, 2011
Messages
49,534
Yes, you need to correct the gel coat prior to the barrier coat and the AF.

Usually gel putty in the gouges, then a layer or two as mentioned
 

alldodge

Moderator
Staff member
Joined
Mar 8, 2009
Messages
42,054
Welcome
Many use Marine Tex epoxy to fill voids in Gelcoat and cracks it glass prior to barrier coats.
 

Scott Danforth

Grumpy Vintage Moderator still playing with boats
Staff member
Joined
Jul 23, 2011
Messages
49,534
I recommend gel coat putty. Some use VE putty, some use epoxy putty
 
Top