"Help!" for: Fiberglassing, Resin, & Bondo
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Spitfire22V
Well-Known Member
If you're using the pre-packaged packets of Bondo that most people use, I ended up needing 4 of them for the entire suit, and I didn't use all of the 4th, maybe 3/4 of it.
You only have 44 posts, can't be this hard to go through them. Let me help you: In your posts list, it's on page 1 of 3, made 03-17-2011 11:21 PM (my time, of course; UTC+2 at the moment). It's in this thread, only four (well, now 5) pages back, post #556.
The reason why you can't find an answer is because only the resin-part of your question was answered. But it's rather similar with the cloth: How much you need depends on how heavy it is and how much you use. 50 yards are around 45 metres and would give you 11 layers, assuming a front and back surface of 2 m² each on a tall wearer. That's a lot unless you get the really thin kind (25 g/m² or so). Rather get 250 g/m² and maybe 10 or 20 metres. Unless you get them pre-packaged, you usually get a quantity discount, so just choose an amount with an attractive price. You can always buy more later.
BlueSol
Active Member
50 yards in length? Or what I'm a bit confused about the question. And 50 yards is a lot dude, that's a half a football field.
when it comes down to it I don't believe there is. you just need to gauge the consistancy to your liking. I believe to get a reasonable mix it is about 4(5):1 of bondo:resin. However, if you are looking for some great tips for any particular steps be it bondo, rondo, molding etc. Ben Streeper has posted some very helpful videos. Most of which you should be able to find here
nightlynutria
New Member
can I do a mold if my helmet has only resin in the outside(without fiberglass) :s?
Nope. The weight of the molding material will crush the helmet. Plus, you need finish shaping it with Bondo, and that will crush the un-hardened helmet.
nightlynutria
New Member
Im having serious problems inderstanding the whole process, ive watched tons of videos, reading hours not only in the Noob Forum,look:
I saw this video of a guy from the 405th who added a layer of fiberglass resin in the outside of his pep helmet, and then adding smoothcast in the inside, I know smoothcast is used in molds(from rebound 25) but this could work in a pep helmet with fiberglass? check the video [video]www.youtube.com/watch?v=ZzzrX1RBAec&feature=fvwrel [/video]
it is supposed that what is coming out from the inside of that helmet is going to be something like this
am I right?
Yeah you're a bit confused. Don't worry, lots of terms thrown around here, and many people do it different ways to get the same results
The picture in your post is actually a casting from a rubber/alginate mother mold. (Whoo more terms to learn)
In basic molding/casting here are the steps
1) Sculpt
this is creating your object via clay or a medium that will allow you to have the details you want on your item to be casted
2) Molding (Creating the Mother Mold)
Usually done with rubber or in an alginate, and depending on the item casted, backed by a plaster case. smaller items do not need the plaster case to hold the shape. if you do your mother mold thick enough, the plaster is not needed.
3) Casting into the mother mold
laying in fiberglass cloth and resin or using pour in plastic (like Smooth on) into the mother mold to cast your final product.
In the video posted, he's using the Smooth on to reinforce the inside, before attempting to work on teh outside of the helmet
What he did, I'm assuming (and from what I"ve seen elsewhere discussed on this board):
1) Pepped his helmet
2) resin the outside of the helmet so that it has a shape, and won't bend, and seal up any holes that so that his Smooth-ON Pour In Plastic will not run out of it.
3) Smooth-on the inside (2-3 layers) to reinforce the inside
4) From there, he will work on the details on the outside of the helmet by adding Rondo/Bondo/More Resin until he get its to a thickness he wants or to smooth out the "blockiness" as happens with pepakura helmets
From there, its detailing, sanding, smoothing and painting.
Here's another one to confuse you:
You can use your pepakura helmet like a "sculpt" to cast and it would be handled the same way, however some additional steps than the basic molding process:
1) Pep your helmet
2) Resin the inside so that it can support the weight of an alginate/rubber mold
3) resin the outside, so that the alginate/rubber mold doesn't damage the paper
4) Brush on your Alginate/Rubber several layers over your helmet. ANd by several layers, Im mean several applications. To a thickness that it will not warp your shape when you remove the pep helmet from your mold
Addendum to 4 - you can also do a 2 part mold for the helmet so that you only have to 1/2 at a time .
5) once your rubber mold is done, remove pep helmet and then use the mold to cast your helmet in the medium you wish (Pour on plastic, fiberglass, etc)
The picture in your post is actually a casting from a rubber/alginate mother mold. (Whoo more terms to learn)
In basic molding/casting here are the steps
1) Sculpt
this is creating your object via clay or a medium that will allow you to have the details you want on your item to be casted
2) Molding (Creating the Mother Mold)
Usually done with rubber or in an alginate, and depending on the item casted, backed by a plaster case. smaller items do not need the plaster case to hold the shape. if you do your mother mold thick enough, the plaster is not needed.
3) Casting into the mother mold
laying in fiberglass cloth and resin or using pour in plastic (like Smooth on) into the mother mold to cast your final product.
In the video posted, he's using the Smooth on to reinforce the inside, before attempting to work on teh outside of the helmet
What he did, I'm assuming (and from what I"ve seen elsewhere discussed on this board):
1) Pepped his helmet
2) resin the outside of the helmet so that it has a shape, and won't bend, and seal up any holes that so that his Smooth-ON Pour In Plastic will not run out of it.
3) Smooth-on the inside (2-3 layers) to reinforce the inside
4) From there, he will work on the details on the outside of the helmet by adding Rondo/Bondo/More Resin until he get its to a thickness he wants or to smooth out the "blockiness" as happens with pepakura helmets
From there, its detailing, sanding, smoothing and painting.
Here's another one to confuse you:
You can use your pepakura helmet like a "sculpt" to cast and it would be handled the same way, however some additional steps than the basic molding process:
1) Pep your helmet
2) Resin the inside so that it can support the weight of an alginate/rubber mold
3) resin the outside, so that the alginate/rubber mold doesn't damage the paper
4) Brush on your Alginate/Rubber several layers over your helmet. ANd by several layers, Im mean several applications. To a thickness that it will not warp your shape when you remove the pep helmet from your mold
Addendum to 4 - you can also do a 2 part mold for the helmet so that you only have to 1/2 at a time .
5) once your rubber mold is done, remove pep helmet and then use the mold to cast your helmet in the medium you wish (Pour on plastic, fiberglass, etc)
I'm interested in doing rondo to the inside of my helmet to strengthen it instead of fiberglass. I watched Ben's how to videos and it showed the approximate amounts of bondo, resin and hardener. I was wondering if there is a thread that goes into a little more detail that I am missing or if anyone can elaborate a little more or tips they could give me before I start. Thanks
Rondo is basically on how much you feel would be good. its simply guess work on your part. You determine what is the best amounts to work with
3:1 is usually a good ratio of bondo to resin, but you can add more resin or less depending on what you are doing, and your "feel" of it.
3:1 is usually a good ratio of bondo to resin, but you can add more resin or less depending on what you are doing, and your "feel" of it.
alright, i guess i'll just rondo the helmet lol
hey guys quik Q im poor and was only able to by bondo is it posible to use bondo only on the pep instead of every thing else? please send answer to
pandaman0413@yahoo.com so ill be alerted instantly when u respond
pandaman0413@yahoo.com so ill be alerted instantly when u respond
nightlynutria
New Member
i think you cant, but since I am in the same position as you im gonna tell you what im going to do (but you need resin), is not that expensive and its really going to help you, search for something called rondo, there are some really helpful tutorials out there i've been watching them
diskodasko
New Member
im having a little trouble with the sanding of the project im working on, i dont really know if im using the right tools and how far do you sand back.
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