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Latex paint

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Richard Pike

Joined: 09 Jan 2006
Posts: 1671
Location: Blountville, Tennessee

Posted: Sat Nov 20, 2010 4:48 pm Post subject: Latex paint

Forget it.



Did the weight and balance today and what a disappointment it turned out to be. Latex is not lighter than the other systems, and it is a lot harder to work with. Ended up using 4 different spray guns, and was not happy with any of them. The airplane will probably look good after the details get touched up,  but what a pain this has been compared with using Stits, Randolph, or Certified Coatings. 



Never again. Hope I have not led anyone else astray, if so, please accept my apologies, this has been a real soup sandwich.  



Richard Pike

MKIII N420P (420ldPoops)

gliderx5

Joined: 30 Jun 2008
Posts: 203

Posted: Sat Nov 20, 2010 6:03 pm Post subject: Latex paint

Richard



I'm just now finishing painting the fuselage on my Pietenpol with Behr gloss exterior latex.  I too tried several spray guns, having some success with a Harbor Freight touch up gun for small areas, and a Lowes Kobalt Latex spray gun for large areas.  I do not have an HVLP system, but I think one might work.   I thinned just a touch more than the instructions on the paint can which said 1/2 pint per gallon.  I brushed on 3 thinned coats of Glidden gray primer, and sprayed 3 or 4 coats of color.  I came out better than I was expecting, but not a professional job for sure.  I will post some pictures in a few days.  For me, it didn't seem too difficult to work with.  The cost, and above all no stinky fumes have me sold on the process.  Also I'm painting in my basement.



Malcolm Morrison

Kolb MKII (for sale)

Pietenpol Air Camper

ASW-15

http://home.comcast.net/~mmorrison123



---

rickofudall

Joined: 19 Sep 2009
Posts: 1392
Location: Udall, KS, USA

Posted: Sat Nov 20, 2010 6:40 pm Post subject: Latex paint

Richard, I'm just about to start on the tail feathers of Zulu Delta so I'm interested. Can you give some more detail on how you did the painting? Sealers and primers? What you'd do different? TIA.



 Rick Girard



On Sat, Nov 20, 2010 at 6:48 PM, Richard Pike <richard(at)bcchapel.org (richard(at)bcchapel.org)> wrote:

 	  Quote: 	
		   --> Kolb-List message posted by: "Richard Pike" <richard(at)bcchapel.org (richard(at)bcchapel.org)>

 

 Forget it.

 

 Did the weight and balance today and what a disappointment it turned out to be. Latex is not lighter than the other systems, and it is a lot harder to work with. Ended up using 4 different spray guns, and was not happy with any of them. The airplane will probably look good after the details get touched up,  but what a pain this has been compared with using Stits, Randolph, or Certified Coatings.

  

 Never again. Hope I have not led anyone else astray, if so, please accept my apologies, this has been a real soup sandwich.

 

 Richard Pike

 MKIII N420P (420ldPoops)

 

 

 

 

 Read this topic online here:

 

 http://forums.matronics.com/viewtopic.php?p=320214#320214

 

 

 

 

 

 

 

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flypoker(at)windstream.ne
Guest

Posted: Sun Nov 21, 2010 5:44 am Post subject: Latex paint

I am also on the Challenger list. There has been a  lot of discussion on that group about latex. Several guys have used it. Maybe a  latex paint list should be started. 

 Jerry

 [quote]   ---

Richard Pike

Joined: 09 Jan 2006
Posts: 1671
Location: Blountville, Tennessee

Posted: Sun Nov 21, 2010 6:18 am Post subject: Re: Latex paint

A couple months back I was touting Latex as being a good alternative because I used it years ago on a couple Hummers, and it went on easy, looked good, and was light. Used Sears Weatherbeater and thinned it with water. 



This time around used blue from Sherwin Williams, and the yellow from Lowes because those were the brands who best matched the color. Used black for the underbase and fabric sealer, that worked ok, the rest was hard to spray, none of the various guns I tried wanted to cooperate.



If I had it to do over, I could have used Certified Coatings brand for about the same cost, (or Stits for twice as much) and shooting it would have been a lot less complicated and frustrating.



Maybe if you have the right gun it would be different, but that didn't happen for me. And the weight turned out about the same, which was the main reason for doing it - was expecting it to be lighter.



Richard Pike

MKIII N420P (420ldPoops)

slyck(at)frontiernet.net
Guest

Posted: Sun Nov 21, 2010 7:13 am Post subject: Latex paint

Sorry you had problems.  The unfortunate fact is the formulations of the various house paints are not well revealed which makes

divining their properties difficult unless you buy one of each and test them.  The top rated exteriors now incorporate some urethane

in the blend.   From what I've read, California, Pratt and Lambert, Behr and Sears Weatherbeater Ultra are among the better brands.



It would be tempting to try a clear water based urethane and add a tint to create your own flex coating.

BB



On 21, Nov 2010, at 9:18 AM, Richard Pike wrote:



 	  Quote: 	
		   

 

 A couple months back I was touting Latex as being a good alternative because I used it years ago on a couple Hummers, and it went on easy, looked good, and was light. Used Sears Weatherbeater and thinned it with water. 

 

 This time around used blue from Sherwin Williams, and the yellow from Lowes because those were the brands who best matched the color. Used black for the underbase and fabric sealer, that worked ok, the rest was hard to spray, none of the various guns I tried wanted to cooperate.

 

 If I had it to do over, I could have used Certified Coatings brand for about the same cost, (or Stits for twice as much) and shooting it would have been a lot less complicated and frustrating.

 

 Maybe if you have the right gun it would be different, but that didn't happen for me. And the weight turned out about the same, which was the main reason for doing it - was expecting it to be lighter.

 

 Richard Pike

 MKIII N420P (420ldPoops)

 

 

 

 

 Read this topic online here:

 

 http://forums.matronics.com/viewtopic.php?p=320330#320330

jbhart(at)onlyinternet.ne
Guest

Posted: Sun Nov 21, 2010 8:27 am Post subject: Latex paint

Richard,



Did you thin your latex paint with water and methyl or ethanol alcohol?



Since I was attaching fabric to foam fairings, I applied non cut latex with 

a brush to hold the fabric to the foam.  It worked like a charm.  The only 

problem I had was that, due to the high surface tension very small bubbles 

floated up to the surface, and they did not break out of the surface.



In Googling about how RC modelers use latex, I found that they thin latex 

with windshield wiper fluid.  The alcohol breaks down or lowers the surface 

tension and increases the wet ability of the mixture, and the water thins 

out the mixture.  I believe you could expect better spray gun performance 

with the addition of the alcohol.  One can check this out by dipping a straw 

into the latex paint and observing the drop size as on slowly rotates the 

straw to form a drop on the end of the straw.  Next take a sample and cut it 

with water and alcohol and perform the same test.  The drop size should 

become smaller indicating surface tension reduction.



FWIW



Jack B. Hart FF004

Winchester, IN

gliderx5

Joined: 30 Jun 2008
Posts: 203

Posted: Sun Nov 21, 2010 4:35 pm Post subject: Latex paint

Richard Pike

Joined: 09 Jan 2006
Posts: 1671
Location: Blountville, Tennessee

Posted: Sun Nov 21, 2010 7:16 pm Post subject: Re: Latex paint

 	  jbhart(at)onlyinternet.ne wrote: 	
		  Richard,



Did you thin your latex paint with water and methyl or ethanol alcohol?



<snip>



Jack B. Hart FF004

Winchester, IN 	




Used a flow agent I bought from the Sherwin-Williams store, it is supposed to thin the latex, make it flow out smoothly, but not slow down the tack/drying process. After I got home and read the can, it is about the same stuff as windshield washer fluid. Costs a lot more...



And it helped, but the results are still - well - I will be spending the day in the garage tomorrow dealing with the blemishes.



Richard Pike

MKIII N420P (420ldPoops)

gliderx5

Joined: 30 Jun 2008
Posts: 203

Posted: Wed Nov 24, 2010 3:25 pm Post subject: Latex paint

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