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How much plasticine did you use on the spoiler? And what exactly did you use to mold it?
1. Fist you have to find a place that sells this kind of stuff.
2. When your spoiler is ready you have put the release agent (its a mold release agent that's liquid it wont work with wax on plasticine or ruff molds) wait till its dry about 20min do this 5 times all over may take a while.
3.Now fiberglass and wait 6hours at least (may be more or less depending on the mix you made) if after 8 hours it's still wet you may have fail somewhere!
4.Unmold, you now have a first mold and your plasticine all dirty (release agent in the mold 5 times)
5. Fiberglass again in the mold, wait 6 hours again then unmold
6. Now you have a prototype part, use putty all over and sand it till its perfect, may take a while if your doing it by hand, i always sand by hand or use a block sand!
That wing took me about 120h and at least 100$ to make and i damaged the trunk pretty badly, you have to remember that its still a prototype part its very fragile.
The best way to show you how to make this kind of things is if you spend time with me lol Its pretty hard to explain on a forum, a big part of the job is seeing and understanding what you have to do.
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