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Sherwin williams GBP-988 question.

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lhelming(at)sigecom.net
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Posted: Sat Feb 04, 2006 8:36 pm Post subject: Sherwin williams GBP-988 question.

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rv7(at)b4.ca
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Posted: Sun Feb 05, 2006 8:45 am Post subject: Sherwin williams GBP-988 question.

On 17:59:14 2006-02-04 David Karlsberg <claypride(at)hotmail.com> wrote:

 	  Quote: 	
		   2.  How much of this stuff do I use?  I usually have to spray every

 part twice to get all the pieces covered.  I have already gone

 through a can just on the HS.


	


I'm on my second rattle can, and i'm not finished the empennage yet.  And

i'm not priming the skins (other than the lines where the ribs contact

them).  Full coverage on ribs and non-alclad parts, though.



A Sherwin-Williams rep that used to be a member of our flying club told me

that the best way to apply it is to put on two or three very light coats to

obtain the best coverage and adhesion.  Almost a "dusting" of paint each

time.  It's worked fine so far, and I haven't had the problem that some

others seem to with the paint sometimes flaking off.  Prepping with

Sher-Wil-Clean, which is the recommended prep for this paint.



 	  Quote: 	
		   4.  Am I supposed to shake the can before I spray?


	


You're supposed to read the directions on the can, which say to shake it

for something like two minutes after the ball comes free from the bottom of

the can.  Before spraying.  I shake the can between sprays too, just to be

sure.  If you haven't been shaking it at all, that's why you're getting

uneven colour and texture in your results.



For what it's worth, i'll be switching to Marhyde when I finish the SW can

i'm using now.  The people who have used both seem to agree that Marhyde

provides a tougher, more durable finish.  Not so important on the inside of

your airplane once it's finished, perhaps, but it might be while you're

handling the parts during assembly.



-Rob

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dburton(at)nwlink.com
Guest

Posted: Sun Feb 05, 2006 9:31 am Post subject: Sherwin williams GBP-988 question.

 	  Quote: 	
		   For what it's worth, i'll be switching to Marhyde when I finish the SW can

 i'm using now.  The people who have used both seem to agree that Marhyde

 provides a tougher, more durable finish.  Not so important on the inside 

 of

 your airplane once it's finished, perhaps, but it might be while you're

 handling the parts during assembly.



 -Rob


	


FWIW,  I started with a can of Marhyde (I like their products BTW) to use 

when I needed to spritz a part and didn't want to mix up some primer to 

spray.  I bought a can of GBP when I needed another can on advice from 

others on the list and like it better.  That said, I'd buy a can of Marhyde 

if there was some reason I couldn't get the GBP...



Dave B

RV6

B

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randy(at)romeolima.com
Guest

Posted: Sun Feb 05, 2006 12:47 pm Post subject: Sherwin williams GBP-988 question.

 	  Quote: 	
		   For what it's worth, i'll be switching to Marhyde when I finish the SW can

 i'm using now.  The people who have used both seem to agree that Marhyde

 provides a tougher, more durable finish.


	


Having used both products I'd agree with this assessment. But I prefer SEM 

to them both in terms of both the finish it leaves and its durability. To 

those that apply the primer without first Scothbriting the surface, no 

question it does NOT adhere as well. Dip your Scotchbrite pad in your 

solvent of choice when scuffing and you degrease at the same time. Here's my 

two cents worth...

http://www.romeolima.com/RV3works/Airframe/airframe.htm#Primer



Randy Lervold

www.rv-3.com

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