White Spots

The use of peel ply is the next closest thing to bagging down a laminate !!(about this time Cat builder will be re adjusting his glasses and reaching for another beer!! )
All the work we do we use peel ply ! like everything bar nothing reguardless of size or shpe !!
peel ply takes a little getting used to and theres a lot of seemingly impossible places that you need to use it but just get on with it and make it fit .
Peel ply can be your friend if you let it be !! It will tell you if you have enough resin on you panel and if you have to much it will let it through to the top and when you rip it off will take the surplus so you are left with glass that got the correct amount in it !!
Peel ply will give you a really professional laminate ! it helps to hold down and semi compress the layers of glass !! smooths edges and when rolled out you can see instantly what the surface is like , also is easyer to see bubbles through because the surface is smooth ! Remember peel ply can stay in the job for months if need be !! When working inside a hull its a good way to make sure the bilges will be clean when the time comes to paint there ! Just peel ,hand scuff and paint! that simple !! All the dirt ,grot ,drips ,dribbles and foot prints are gone and you have a virgin 100% clean surface that has no pollutants of any discription on it just a bare glass and resin surface !!
Can save hours and hours of un-nessasary grinding or sanding and hours of the itchs !!
For glassing in Bulkheads and the like its heaven as the glass can be sculptured and feathered out onto the hull and the bulkhead . Doing repairs where you have ground a hollow its possible to see if there enought glass to bring the repair to the same level as was before so vertually no filling with bog is required .
There are a million uses for peel ply! be friends with it ,it is there to help you !!!.

Remember peel ply will only leave you with the right amount of resin to wet the glass 100% thats all ,If you have done everything correctly !!!

by now cat builder will be looking for that another 6 pack !!

I been using peelply and showing other the merits of peel ply for the past 10 years or more and laid square kilometers of it !! One job making double sided panels we used 3 rolls a day in the 1.5 mtr width rolls plus other smaller width rolls as well ,200mm , 150mm , 100mm , and even 50mm rolls to use in corners of 10 metre long carbon and glass girders in the 4 internal corners .

If you are exsperiancing problems its not the material thats the problem its you !!
Know and understand the materials you are working with it help !!

 

Yup, operator error has always been the stray parameter I've had trouble with. I'm finally becoming confident about my understanding of this process and how to use this new-to-me epoxy product (always a West System user prior to this). I'll be willing to take my wife, aka most favorite person, into deep water in this boat when it's done.

Lots of good help here. Thanks to all.

 

Well I'll be damned if old Tunnels isn't growing on me! ha ha ha

I'll give the peel ply another go and wet it out well (really wet) to see how it goes. Why not? There's nothing to lose.

 

I'll use peel ply with the vacuum laminations that are coming soon to a shop very near me. I needed to get the C-Flex and plywood that constitute a male form for my hull extension well sealed with epoxy and glass to make it a very-nearly airtight surface for vacuum work when I get back. I'll be using peel ply and perforated release film with a woodworking breather mesh. It's coarser than the coarse felt offered for fiberglass work but I think it'll be fine.

 

Ah, I always use peel ply with resin infusion. There is no other way. Helps you get the flow media off.

 

Using peel ply in just ordinary everyday laminating makes a nice smooth finish and its impossible to stuff the resin content of the glass !!
To much resin gets rolled out and it comes throught to the top surface !!,
to little resin ( dry glass ) the peel plys got no shine or gloss !!
so whats the problem ??
Is that really to hard ?
aaaah i know its to simple !!
Some people cannot cope with simplicity this is a well known fact !! if its simple then theres something missing and they go round and round looking for the missing piece and ask lots of meaning less pointless questions !, it drives them crazy almost if they cant find anything wrong with it !!:idea:

I'll give the peel ply another go and wet it out well (really wet) to see how it goes. Why not? There's nothing to lose.
Dont ya just love the reply !! really wet ?? what happened to wet ! like as in enough to wet the glass out !
Id love to be a fly on your ceiling for a week to see what you do and how you do what you do !!

 

Well, at least it's a short drive for me...

 

I don't even need to drive, I can easily walk to the White Spot near my house.

 

More simple is just wetting out your glass and being done. Without peel ply, you can see air bubbles better.
Peel ply, literally, adds one more layer of complexity to a lamination.
But I'm going to try it on my next hand lamination. Just from this thread.

 

If you cant see the bubbles better you using the wrong peel ply ! Air tech with the red lines . Bubbles smaller than the end if a pen can be seen very clearly as the peel ply almost magnifies them .
We can lay 3 layers of glass (2 X 820 gram 0/90/and a 450 csm ) and over the top peel ply then roll the whole lot out together in one shot !! you can see right to the bottom of the laminate stack throught the peel ply and all the glass is compressed and compacted very close to what the % is for bagged glass !! and there never a roller mark to be seen in any part of any laminate because i check it all from end to end myself to make sure . Everything we make exceeds DNV specs for quality and weigths of glass to resin percentages .
Been doing this half my life so know whats exspected and how to get it and dont take anything less from any of the people working with me !!. I preffer to have women workers frankly because they have a keener eye for detail ,are more methodical in there work practices !! and better looking !!!

 

we laid up a cold molded 24' yesterday that very same condition occoured our boat has been dry , we applied a coat of epoxy let it begin to kick applied a wet coat rolled on the 1708 and rolled it well with a very wet coat!, squeegee it off and still had the very same spots!. I tryed removeing a section pourig epoxy behind the cloth , so I know it was wet ,, love to know why!

IN our case we did not use peel ply !

 

Take your squeegee's and drop them in the rubbish bin !! you are taking to much resin out of the glass . For God only know how long i have only ever used a 6 inch paint roller and never had those problems ever in 30 years .
resin /glass starvation !! with or without peel ply shouldnt make any differance !

 

brokensheer,

Certainly, I don't know why your very wet lamination ended up with white spots starved for epoxy, but I wonder if you had first coated the cold-molded substrate with a couple of coats of epoxy. On the surface of your short post, it sounds like the 1708 appeared well wetted out when you left it. A dry substrate will absorb a surprising amount of resin sucking it out of the fiberglass above.

 

I agree with you but I was using it to "locally" remove the areas I was trying to change,, Thanks

 

Just as a mater of interest is the surface vertical or horizontal ??where the spots are !!Can you post some pictures !! you said you used 1708 this had csm on one side ?? if so which side went down against the surface ?? .
:?: