fiberglass work

sandhopper · Posted: Sat Sep 20, 2014 9:16 pm Post subject: fiberglass work

Started some fiberglass work on full lenght project
Some one cut the front cross and also the front of the hood
After seeing some parts copied from other buggys I thought I would give it a try
Not perfect but this part will be under the hood
Happy with the out come and now will tackle more

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sbussard · Posted: Sun Sep 21, 2014 6:16 am Post subject:

Looks good. Do you have any pictures of how you did it? I've never tried to copy a part before, but looks like it is fairly involved.

Scott
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surfnc · Posted: Sun Sep 21, 2014 6:27 am Post subject:

Sandhopper
Nice Work!!

Scott
Here you go:

http://www.thesamba.com/vw/forum/viewtopic.php?t=500792&highlight=mold

Vince
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sandhopper · Posted: Sun Sep 21, 2014 7:54 am Post subject: fiberglass

Scott , like Vince posted that is what I did following his post somewhat
I did not have any PVA so I used Aluminum foil , next time need some PVA
I also did not use this to make another part as it did not have to be perfict
I used the splashed part to fill my gap
The next part on this buggy is the front part to the hood , not real sure yet to make the plug from
Larry

Dale M. · Posted: Sun Sep 21, 2014 8:12 am Post subject:

To make a plug, you can use some sort of rigid foam (block) and cover it with plastic wrap... Get it as close as you can before doing layup...

Dale
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sandhopper · Posted: Sun Sep 21, 2014 10:59 am Post subject: fiberglass

I don't have any PVA release , if using plastic on the plug for the hood part do I need it or wax on the plastic ?
When I did the Aluminum some of it stuck and as I did not get it super smooth it showed
Still trying to learn before I tackle the larger projects
Larry

jspbtown · Samba Member Joined: January 27, 2004 Posts: 5157

Just use some plastic wrap and obviously try to keep it as wrinkle free as possible.

Good work on the under the hood section. That would be the perfect place to try your hand at some filler work. Spend some time on a part that won't be seen so you get proficient at doing it for the part that does show.

monomanx · Posted: Mon Sep 22, 2014 3:02 pm Post subject:

If you have a nice part to begin with, you can get away with waxing the part ALOT with PARTALL wax available from fiberglass houses. You can also use HIGH QUALITY carnauba wax from flaps but you really need to make sure and apply many layers.
http://www.shopmaninc.com/moldrelease.html

For release surfaces, I have also used clear box tape (2 inch wide) and waxed it. The nice thing with the box tape is that it will conform pretty nicely and it will stay in place. You can make sure there are no wrinkles as with plastic wrap or aluminum foil.

didget69 · Posted: Tue Sep 23, 2014 2:30 pm Post subject:

My primary mold material is house insulation blue foam, or the yellow urethane foam sheets, glued together with contact/rubber cement, Once I have my part shape sanded & created, I use spray contact cement, then lay smoothed out plastic wrap over the glue & smooth out the wrinkles.

Produces a fairly smooth part layup.

bnc
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kustoms · Samba Member Joined: November 20, 2003 Posts: 1313

Nice work.

sbussard

Use Styrofoam then use epoxy paint. Shape your part, paint and wax.

I would also do a reverse mold by flipping the body over. This way it would look some what natural.

Another Idea is to pull a mold from a donor body but this is a little more difficult unless your like My self or Vince who happen to keep inventory.

Since I am on the subject if you are making a small part you can use clay.

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kustoms · Samba Member Joined: November 20, 2003 Posts: 1313

Sandhopper, One more thing. You do not need PVA. "Poly vinyl alcohol" Is nothing more then a water soluble film that you brush or spray on. When you are ready to pull the part you add water.
Use a good carnauba paste wax. you should be just fine.

One thing I like to do when filling a hole is to use old fiberglass if it is on the out side (visible). It will be dryer and pre shrunk. This will help eliminate the "halo". After cleaning the edges I cut a piece the shape of the hole and use ABS as a scab. No wax needed.

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sandhopper · Posted: Fri Sep 26, 2014 8:12 am Post subject: fiberglass

thanks Tom those are some great pictures
do you use cloth or mat mostly ?

kustoms · Samba Member Joined: November 20, 2003 Posts: 1313

I use both depending on the job. Most of my work is with mat though.
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sandhopper · Posted: Fri Sep 26, 2014 9:44 am Post subject:

when would you use cloth ?
I was thinking if I'm not making a mold and only say laying up a part from a doner that cloth would give the best smooth finish
Larry

kustoms · Samba Member Joined: November 20, 2003 Posts: 1313

I would stick to mat. I use cloth to make parts like consoles, boxes and such that require a higher tolerance space wise. You can check out the build I am doing for my self I get in to some pretty good detail in it.

http://www.thesamba.com/vw/forum/viewtopic.php?t=485916
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sandhopper · Posted: Sun Sep 28, 2014 6:39 pm Post subject: fiberglass hood repair

Here is the start of the foam to repair the hood

will continue to ruff out the shape and add more foam to this befor I start the lay up I will use tape over the foam for release agent as I don't have PVA
If the foam does not come off I will use something to desolve it
Larry

jspbtown · Samba Member Joined: January 27, 2004 Posts: 5157

A wire wheel on a drill will make quick work of it as well without the use of any chemicals which could effect the glass.

kustoms · Samba Member Joined: November 20, 2003 Posts: 1313

jspbtown · Samba Member Joined: January 27, 2004 Posts: 5157

sandhopper · Posted: Mon Sep 29, 2014 8:03 am Post subject: fiberglass

I have a file some call it cheese grader type to ruff the shape then I will uses sand paper . Thought I would use packing tape and some Pam cooking spray to cover the foam. If the foam will not come off after the layup I will try the wire wheel thing ( THANKS )
Larry


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