When I've talked with Jerry about this the usual practice would have been spraying black (aka 'back black') after spraying the hull and boot stripe colors. The reason black is used is to limit seeing the sun through the hull. Seen boats where this isn't done and you see this round circle of the sun when in the cabin. :: Dave Scobie :: M6'8" #650 :: SV SWALLOW - sv-swallow.com :: former owner M17 #375 SWEET PEA - m17-375.com :: former owner M15 #288 SCRED - www.freewebs.com/m15-named-scred/ On Fri, Apr 26, 2019, 7:42 AM <swwheatley@comcast.net> wrote:
The red is the first layer of polyester resin. I believe it is tinted on purpose to help the builder see whether there is thorough coverage over the gelcoat. Presumably they use a different color tint when spraying over red gelcoat.
Based on your photos, you do not need new gelcoat but you should apply an epoxy barrier coat. I have had good results with the Petit product. I don't know if this is still true, but it used to be the Petit product was thicker and required fewer coats than the Interlux product.
-----Original Message----- From: montgomery_boats <montgomery_boats-bounces@mailman.xmission.com> On Behalf Of Gerry Lempicki via montgomery_boats Sent: Thursday, April 25, 2019 6:47 PM To: Dave Scobie <scoobscobie@gmail.com> Cc: For and about Montgomery Sailboats <montgomery_boats@mailman.xmission.com> Subject: Re: M_Boats: Gelcoat; great info!
If I had to guess I'd say there is both a red and a white gelcoat. Here's a photo from today when all the paint has been removed. Maybe a red gelcoat under the white? The red stripe is definitely not paint. And if I sand through the white gelcoat below the waterline, I hit red.
-Gerry
On Apr 25, 2019, at 6:29 PM, Dave Scobie <scoobscobie@gmail.com> wrote:
Garry:
is the red her original gel coat color?
is the white being sanded off old bottom paint or a later finish?
:: Dave Scobie :: M17 #375 SWEET PEA - https://m17-375.com/ FOR SALE! :: SV SWALLOW - https://sv-swallow.com :: Montgomery 6'8" #650 :: Truck camper - https://truckpopupcamper.wordpress.com/ :: Ramblings - https://scoobsramblings.wordpress.com/ :: former M15 owner #288 - http://www.freewebs.com/m15-name-scred
On Thu, Apr 25, 2019 at 2:55 PM Gerry Lempicki via montgomery_boats <montgomery_boats@mailman.xmission.com> wrote: Thanks for the replies! I'm going to try to attach a couple photos. If they come through, one is the underside of the lapstrakes, a few areas with lots of little holes (bubbles when applied?) And a flat area with similar sized spots. Fill the holes with my epoxy fairing? Then prime over it all?
-Gerry