Advice on mouldmaking


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MarkMK
MarkMK
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You might also find that some selective use pieces of 3mm closed cell foam sheet and glue will be help to re-inforce the joins, rather than rely on tape alone
Hanaldo
Hanaldo
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That will work. It's the only way with plastic really, as it's pretty unfixable. If it's under the car and you don't care how it looks, just give it a REALLY good clean, tape up/fill the holes etc as you said, and make your mould off of it. 

If for whatever reason you want the finished piece to be cosmetically perfect again, the only real solution is to make a fibreglass copy (if you can do it off the backside of the plastic piece, then it will be the same orientation as the original and you won't have to double the process), and fix that up before making your mould. Also not a hard process, but pretty unnecessary if you will never lay eyes on it again. 
Ronny
Ronny
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Hi
Im new at this, having made one uni-mould and one putty-mould before this.

i have a beaten plastic underside panel on my car that i was hoping to create a mould from.
As i have not been able to source a mint piece, this is what i have to work with.

Underside (facing away from the mould)
http://i.imgur.com/JOrNPTH.jpg




Side facing the mould
http://i.imgur.com/wzIXHE2.jpg


So i was thinking of taping and gluing it back together.
To cover the holes, where the plastic is gone i figured i could use some sort of backingplate, and fill it up with plasticine.

Any advice appreciated
GO

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