Re: latex paint question

I had the opposite problem on Diablo. The paint has adhered very
well to the epoxy, and is peeling on the non-epoxied surfaces. I
think
it is because I washed the blush off the epoxy with soap and water
first, then I used high gloss alkyd based enamel for paint. It is a
very hard finish that washes off easily. Sanding works ok, but the
real issue is to get rid of the oily amine blush and get a really
clean
surface for the paint.

David Jost "avoiding work, by virtual boating"
Lincoln Ross wrote:
>
> What kind of polyester did you use? Some kinds have wax in them
> which comes to the surface to keep air out so they cure all the way
> to
> the outside. If yours felt completely cured (not sticky) on the
> outside before painting, I bet it was that type. Needs to have this
> wax scrubbed off for good paint adhesion, I think. But someone else
> with more experience may have a better idea, and I don't know
> anything
> about Zinzer.
>
> P.S. You can get polyester resin without this wax, but I don't recall
> what it's called. Makes it much easier if you want to put on another
> layer later.


The two types of Polyester resin are Laminating and
Surfacing. Surfacing has the wax, but you can also add that
to the other. The way they are used is to work with
laminating resin till the last coat, so you don't have to
sand between. Then, the last coat has the wax and completely
cures.

As opposed to just scrubbing off an epoxy's amine blush, you
have to sand the wax . Then go on to fill and paint.

A polyester resin might not be completely cured yet still
not be very sticky. A good cure will end up quite hard.
I looked on the can.  It was Sherwin Williams pro block.
 
James
 
----- Original Message -----
Sent:Monday, June 12, 2000 3:55 PM
Subject:Re: [bolger] Re: latex paint question

I can't remember the number, but it was Sherwin-Williams
best.  Someone on the list had used it and reccomended it.
 
James
 
----- Original Message -----
Sent:Monday, June 12, 2000 3:37 PM
Subject:Re: [bolger] Re: latex paint question

what type of primer did you use?
 
 
----- Original Message -----
Sent:Monday, June 12, 2000 4:10 PM
Subject:Re: [bolger] Re: latex paint question

I just put a new boat in the water this weekend.  It is plywood construction with taped seams.  I used epoxy resin.  I had the same problem with paint coming off the resin.  I sanded the resin down with 50 grit before painting.  I used  good primer followed by latex paint.  Still peeled.  It stuck very well
on the wood areas.
 
James Fuller
 
----- Original Message -----
Sent:Monday, June 12, 2000 2:46 PM
Subject:Re: [bolger] Re: latex paint question

On Mon, 12 Jun 2000, Harry W. James wrote:
> As far as getting paint to stick I would go with the sanding
> suggestion. I have never tried to put latex over polyester.

Me too.  I've put latex on polyester--not a problem if cleaned up nicely.

Chris Crandall              crandall@...      (785) 864-4131
Department of Psychology  University of Kansas    Lawrence, KS  66045
  I have data convincingly disconfirming the Duhem-Quine hypothesis.


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I can't remember the number, but it was Sherwin-Williams
best.  Someone on the list had used it and reccomended it.
 
James
 
----- Original Message -----
Sent:Monday, June 12, 2000 3:37 PM
Subject:Re: [bolger] Re: latex paint question

what type of primer did you use?
 
 
----- Original Message -----
Sent:Monday, June 12, 2000 4:10 PM
Subject:Re: [bolger] Re: latex paint question

I just put a new boat in the water this weekend.  It is plywood construction with taped seams.  I used epoxy resin.  I had the same problem with paint coming off the resin.  I sanded the resin down with 50 grit before painting.  I used  good primer followed by latex paint.  Still peeled.  It stuck very well
on the wood areas.
 
James Fuller
 
----- Original Message -----
Sent:Monday, June 12, 2000 2:46 PM
Subject:Re: [bolger] Re: latex paint question

On Mon, 12 Jun 2000, Harry W. James wrote:
> As far as getting paint to stick I would go with the sanding
> suggestion. I have never tried to put latex over polyester.

Me too.  I've put latex on polyester--not a problem if cleaned up nicely.

Chris Crandall              crandall@...      (785) 864-4131
Department of Psychology  University of Kansas    Lawrence, KS  66045
  I have data convincingly disconfirming the Duhem-Quine hypothesis.


Posting rules:
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In a message dated 6/12/2000 5:20:08 PM Eastern Daylight Time,jamar@...
writes:

<< I just put a new boat in the water this weekend. It is plywood
construction with taped seams. I used epoxy resin. I had the same problem
with paint coming off the resin. I sanded the resin down with 50 grit before
painting. I used good primer followed by latex paint. Still peeled. It
stuck very well
on the wood areas.
>>

I do believe that not all primers are equal. West System did a test of latex
primers which they will send out to those who are wondering about the
outcome. Latex primers were better than most of the oil based primers -
Sherwin Williams pro bloc was one of the best. Steve Anderson
what type of primer did you use?
 
 
----- Original Message -----
Sent:Monday, June 12, 2000 4:10 PM
Subject:Re: [bolger] Re: latex paint question

I just put a new boat in the water this weekend.  It is plywood construction with taped seams.  I used epoxy resin.  I had the same problem with paint coming off the resin.  I sanded the resin down with 50 grit before painting.  I used  good primer followed by latex paint.  Still peeled.  It stuck very well
on the wood areas.
 
James Fuller
 
----- Original Message -----
Sent:Monday, June 12, 2000 2:46 PM
Subject:Re: [bolger] Re: latex paint question

On Mon, 12 Jun 2000, Harry W. James wrote:
> As far as getting paint to stick I would go with the sanding
> suggestion. I have never tried to put latex over polyester.

Me too.  I've put latex on polyester--not a problem if cleaned up nicely.

Chris Crandall              crandall@...      (785) 864-4131
Department of Psychology  University of Kansas    Lawrence, KS  66045
  I have data convincingly disconfirming the Duhem-Quine hypothesis.


Posting rules:
- please stay on topic
- add your comments at the top and sign your name
- check for "content" before sending: please take "thanks" and "me too!" posts off-list.
Posting rules:
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I just put a new boat in the water this weekend.  It is plywood construction with taped seams.  I used epoxy resin.  I had the same problem with paint coming off the resin.  I sanded the resin down with 50 grit before painting.  I used  good primer followed by latex paint.  Still peeled.  It stuck very well
on the wood areas.
 
James Fuller
 
----- Original Message -----
Sent:Monday, June 12, 2000 2:46 PM
Subject:Re: [bolger] Re: latex paint question

On Mon, 12 Jun 2000, Harry W. James wrote:
> As far as getting paint to stick I would go with the sanding
> suggestion. I have never tried to put latex over polyester.

Me too.  I've put latex on polyester--not a problem if cleaned up nicely.

Chris Crandall              crandall@...      (785) 864-4131
Department of Psychology  University of Kansas    Lawrence, KS  66045
  I have data convincingly disconfirming the Duhem-Quine hypothesis.


Posting rules:
- please stay on topic
- add your comments at the top and sign your name
- check for "content" before sending: please take "thanks" and "me too!" posts off-list.
On Mon, 12 Jun 2000, Harry W. James wrote:
> As far as getting paint to stick I would go with the sanding
> suggestion. I have never tried to put latex over polyester.

Me too. I've put latex on polyester--not a problem if cleaned up nicely.

Chris Crandallcrandall@...(785) 864-4131
Department of Psychology University of Kansas Lawrence, KS 66045
I have data convincingly disconfirming the Duhem-Quine hypothesis.
>
>
> P.S. You can get polyester resin without this wax, but I don't recall
> what it's called. Makes it much easier if you want to put on another
> layer later.
>

Its called laminating resin as opposed to finishing resin. It will not get
hard by design, it is ready for the next layer.

As far as getting paint to stick I would go with the sanding suggestion. I
have never tried to put latex over polyester.

HJ


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