you say rondo, i say bondo

Murdoch

Sr Member
Hello everyone: i have a questionis rondo the same as bondo, cause all i can find is bondo. I'm making an iron patriot helmet and i've been working with bondo. you see i'm guessing that if i make a bondo helmet and coat it with a release agent,then i would apply fibre glass resin and fibre glass the helmet. Once that is done i would have a mold of the helmet. At that point i would coat the inside fibre glass mold with a release agent and then apply epoxy resin and then carbonfibre-kevlar. Does this idea sound viable. thanx so much for your input. G.Murdoch...
 
Rondo = Bondo with resin. You can't find "rondo" anywhere, since you have to make it yourself.

Basically, you "determine" the ratio depending on how thick you need the rondo to be.

I personally do a 3:1 mix of Bondo to resin. And depending on volume, you determine how much hardener you need (the Bondo hardner mostly - though its a good idea to mix the resin hardener as well)
 
Well i feel intellectually bankrupt. thanx for that. can you tell me - how different is it to work with than just bondo. Also the drying time, is it the same? Or i guess that would depend on how much hardener you use. Thanx for the input. G. Murdoch...
 
I'm sorry i ment to ask about the second part of that question. The fibreglass/mold for carbon fibre. I'm wanting to make it in carbon fibre.hope to hear back. would you mind i pick your brain from time to time. Cheers. G.Murdoch..
 
What's the benefit of mixing resin with bondo?

just making the Bondo/polyester filler more viscous. You're pretty much getting the same thing if you use polyester resin and talc. The best alternative to this is using casting resin and micro balloons and it wouldn't be brittle like "rondo".
 
can you tell me - how different is it to work with than just bondo. Also the drying time, is it the same? Or i guess that would depend on how much hardener you use. Thanx for the input. G. Murdoch...

Much easier for application, you can "brush" it on like resin. If your consistency is like a milk shake partly melted, then you can pretty much do anything with it (as mentioned like roto-casting)

Hardener is always based on how fast you want it to harden. The more, the faster it cures. LEss, then it takes longer to cure and harden. Not enough, then the resin portion will remain tacky (sticky).

I usually use a plastic cup (the red cups that holds about 2 cups of liquid) and I use about a 3 pea size drops of the Bondo hardener (red) and about 10 drops of resin hardener . You don't need to use fiberglass (cloth) if you use Rondo.

Rondo or bondo, both can be used as your master to make a negative mold. Just be sure to use a mold release (depending on the material you're using to make the mold with).

I'm sorry i ment to ask about the second part of that question. The fibreglass/mold for carbon fibre. I'm wanting to make it in carbon fibre.hope to hear back. would you mind i pick your brain from time to time. Cheers. G.Murdoch..

You can if you want, it'll be quite expensive (more than fiberglass).

What's the benefit of mixing resin with bondo?

Easy to brush on, Rotocasting. Extends the amount of your bondo and resin.
 
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