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>Re: I HATE PINHOLES

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Oldsfolks(at)aol.com
Guest

Posted: Sat Jan 21, 2006 5:55 pm Post subject: >Re: I HATE PINHOLES

Boy !!   ME TOO !!!

I hate fibreglas in any form but we have to suffer through it .

I finally found out about Ploy Fibre  "Smooth Prime " ,after I had my  

fingers bleeding just from sanding the parts the air sander couldn't reach  !!

I really regretted not knowing about "Smooth Prime" sooner.  A couple  of 

coats , with easy sanding & it is done.   NO PINHOLES  !!!!!!!!

Try it - you'll like it.  



Bob Olds RV-4  , N1191X

A&P , EAA Tech. Counselor

Charleston,Arkansas

Real  Aviators Fly Taildraggers

Painless

Joined: 10 Jan 2006
Posts: 40
Location: Peshtigo, Wisconsin

Posted: Sat Jan 21, 2006 7:24 pm Post subject: >Re: I HATE PINHOLES

Bob:



How much Smooth Prime did you go through?  Did a quart do the job or did you 

need more than that?  I am trying to apply your experience to a 6A cowl.



Regards,



Jeff Orear

RV6A  N782P  (reserved)

Darn close to inspection time..

Peshtigo, WI

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_________________
Jeff Orear
RV6A N782P
Peshtigo, WI

rice737(at)msn.com
Guest

Posted: Sat Jan 21, 2006 9:31 pm Post subject: >Re: I HATE PINHOLES

Where can you get smooth prime?



Paul

RV8QB



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gerns25(at)netscape.net
Guest

Posted: Sat Jan 21, 2006 10:24 pm Post subject: >Re: I HATE PINHOLES

Here is another area where they RC jet guys have figured it out.  There is a product that I have used on 4 radio controlled fiberglass jets made by Bob Violet Models (www.bvmjets.com) that is a paste of sorts that is simply rubbed on, allowed to dry, and then rubbed off using a paper towel.  This paste is about the consistency of paste car wax.  It works awesome on pinholes and is used before primer.  I think it is called "BVM Pinhole filler"...Wow, isn't that creative!  One would need to buy a couple cans of it as the cans are relatively small.  Like I said, I have used it before and it works very well and is simple and quick.  I plan on using this when I do my cowl and other fiberglass parts on my RV7.  Just another option out there.

 

Darin Hawkes

RV7 N619PB res.

Waiting for Wing Kit 

 

--

sears(at)searnet.com
Guest

Posted: Sun Jan 22, 2006 1:59 am Post subject: >Re: I HATE PINHOLES

 	  Quote: 	
		   Boy !!   ME TOO !!!

 I hate fibreglas in any form but we have to suffer through it .

 I finally found out about Ploy Fibre  "Smooth Prime " ,after I had my

 fingers bleeding just from sanding the parts the air sander couldn't reach

!!
	


 	  Quote: 	
		   I really regretted not knowing about "Smooth Prime" sooner.  A couple  of

 coats , with easy sanding & it is done.   NO PINHOLES  !!!!!!!!

 Try it - you'll like it.




	


Unfortunately, I didn't have the same results as Bob.  I ended up sanding

almost all of the Smooth Prime off of my fiberglass parts and lost about a

week of work doing it.  I ended up using a fast fill primer made by the same

company that made the rest of my finishing products.  It may have been

DuPont; but, it may also have been PPG.  I'm sure all of them make a fast

fill primer.  While spraying this thick primer on, I could spread it into

the pin holes nicely with my fingers and filled them easily in a couple of

coats.  The nice thing is that the stuff is compatible with the rest of the

paint, can fill in minor dings easily, is wet sandable (which was the

problem I had with Smooth Prime), can fill up to 1/16" thick, and does not

seem to run.  I'll be using the same primer, this time.  I seem to have a

few dings to fill.  



Others have had very good luck with Smooth Prime; but, you do have other

choices

that may be more easily obtained.



Jim Sears in KY

RV-6A N198JS (Scooter)

RV-7A #70317  (Skinning wings, etc.)

EAA Tech Counselor

rv9jim(at)juno.com
Guest

Posted: Sun Jan 22, 2006 6:06 am Post subject: >Re: I HATE PINHOLES

Jeff,

        I built a glass airplane and "Smooth Prime" is the best pin hole

filler.  Its water based and is rolled on with a small foam roller.  You

will roll on several 4 to 6 layers of smooth prime only to sand it off. 

The stuff drys quickly ( in several hours in the warm south) and allows

you to put on at least two applications a day.  The key is when your

done,  let the items you filled "dry" for several weeks before painting. 

You can use aux heat to speed it up.  The reason is to remove the water

left in the smooth prime after finishing.  Then you can paint it.  I

recommend you use a misting of black lacquer to provide an indicator of

how you have left the surface.  If any paint is left on the  surface

after sanding, you did not sand that area.  So more smooth prime is added

to raise the lower surface.  It leaves a very nice surface.  You can

become quite anal on how nice you want the surface to look.    In other

words,  "more is better, too much is enough"

Jim

Painless

Joined: 10 Jan 2006
Posts: 40
Location: Peshtigo, Wisconsin

Posted: Sun Jan 22, 2006 6:34 am Post subject: >Re: I HATE PINHOLES

Thanks Jim.  I have heard that guys have had trouble getting rid of 

pinholes, so your advice is appreciated.



Regards,



Jeff

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_________________
Jeff Orear
RV6A N782P
Peshtigo, WI

lifeofreiley2003(at)yahoo
Guest

Posted: Sun Jan 22, 2006 6:56 am Post subject: >Re: I HATE PINHOLES

www.polyfiber.com/uvsmooth/

   

  Darrell

   

   

   

  



Paul Rice <rice737(at)msn.com> wrote:

  



Where can you get smooth prime?



Paul

RV8QB



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shempdowling2(at)earthlin
Guest

Posted: Sun Jan 22, 2006 7:28 am Post subject: >Re: I HATE PINHOLES

I ordered it last night.  Thanks



do not archive



Shemp/Jeff Dowling

RV-6A, N915JD

235 hours

Chicago/Louisville

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shempdowling2(at)earthlin
Guest

Posted: Sun Jan 22, 2006 8:06 am Post subject: >Re: I HATE PINHOLES

So after putting on 3 or 4 coats of primer, do I sand it down or leave it 

sit for a couple of weeks before misting on the lacquer?



Is the lacquer being used as the indicator for high/low spots?



When doing wheel pants or any very curved parts, whats the best way to sand 

them?  Ive been using a wall board sander with a rubber mat you get at any 

hardware store.  Ive been using no finer than 100 grit, hoping the high 

build primer will cover the sanding marks.  I was told to try and use the 

largest sanding block you can for evenness, although I have a feeling Im 

going to have to use my palm for the final sanding.



Shemp/Jeff Dowling

RV-6A, N915JD

235 hours

Chicago/Louisville



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lhelming(at)sigecom.net
Guest

Posted: Sun Jan 22, 2006 11:34 am Post subject: >Re: I HATE PINHOLES

---

sears(at)searnet.com
Guest

Posted: Mon Jan 23, 2006 2:45 am Post subject: >Re: I HATE PINHOLES

 	  Quote: 	
		   Jim, glad you made the statement about smooth prime not being wet

sandable.
	


 	  Quote: 	
		   It is not wet sandable.  It MUST be dry sanded as the directions on the

can
	


 	  Quote: 	
		   state.




	


Larry's right.  At the time I used it, I had the can and the instruction

manual.  Maybe it was assumed I'd dry sand.  The instructions said nothing

about it.  Since we do a lot of wet sanding on RV's, that's what I did with

the Smooth Prime.  What scared me about the stuff was that it would raise in

tiny bubbles while being sanded.  Those would leave pock marks about the

size of pin heads.  I then tried dry sanding the stuff; but, I was afraid

the lifting would also happen while paint was being applied.  It's wet,

also.  I got rid of it and went with a fast fill primer, instead.  If I ever

build a glass airplane, I may try Smooth Prime, again; but, there's a very

slim chance I'll build a glass airplane.  In the meantime, I'll use the fast

fill primer that matches the paint I'll be using.



I just thought I'd let our folks know that not all are happy with the stuff.

It does have drawbacks.



Jim Sears in KY

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