Fast surfacing primer/topcoat

Discussion in 'Fiberglass and Composite Boat Building' started by fallguy, Jan 21, 2018.

  1. fallguy
    Joined: Dec 2016
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    fallguy Senior Member

    Building a female mould. No gelcoat planned; pva and peelply. Boat is getting petit protect n a 2 part paint.

    Just want to know if there is a faster surfacer than spray paint. The last one I did I waited 7 days for the gloss rustoleum paint to harden to fingernail hard. And this mould is holding up other work. The other one wasn’t.

    I have two days of mould finishing before ready to surface coat.

    Thanks.
     
  2. rwatson
    Joined: Aug 2007
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    Location: Tasmania,Australia

    rwatson Senior Member

    Sounds like a product problem, not an application problem. Spray painting wont affect hardening time. Its the chemical reaction that is the problem I bet.
     
  3. fallguy
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    fallguy Senior Member

    Right, rwatson, so do you have any advice for coating moulds fast?
     
  4. rwatson
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    Location: Tasmania,Australia

    rwatson Senior Member

    Yes. Talk to a few professional coating suppliers in your area. Dr Google is your friend.
     
  5. ondarvr
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    Location: Monroe WA

    ondarvr Senior Member

  6. AusShipwright
    Joined: Aug 2016
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    AusShipwright Junior Member

    Mirotone sanding sealer. Normally add pigment to help see how much you’re spraying on
     
  7. fallguy
    Joined: Dec 2016
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    fallguy Senior Member

    I will see if I can get this stuff. It looks like the gel time is 16-24 minutes, but the datasheet doesn't give a cure time; just a sanding hard finish time of 8 hours. Is it safe to assume 8 hours is full cure?
     
  8. ondarvr
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    ondarvr Senior Member

    Normally ready to sand in a couple of hours, but it would depend on ambient temperatures.
     
  9. rwatson
    Joined: Aug 2007
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    rwatson Senior Member

    Dr Google is FULL of people complaining about slow drying Rustoeleum. Who suggested that in the first place ??
     

  10. fallguy
    Joined: Dec 2016
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    fallguy Senior Member

    I honestly didn’t get a brand rec; someone just told me to spraypaint it. Like I said, it didn’t matter before; the mould was made a month or two ahead of time. This mould is for the beaching keel and conforms to the hull. It just got fillets and radiuses. Another day and it will be ready to duratec. My supplier carries it here in the cities.

    Hull#1 is upside down getting some bottomnwork and I want it out of the building by Jan 30, so I can’t watch paint dry a week.

    Thanks ondarvr!
     
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