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Here is how I made my own replica coins.



Step 1 - Casting
Use a molding material of your choice (I used Super Sculpey) and press your piece into the material.


Step 2 - Prep Molds
Set your molds on a level surface and coat with a release agent (I used a spray).


Step 3 - Casting Material
Mix your casting material according to the directions. I measured out 1 Tablespoon of resin and added 18 drops of the catalyst to make 10 coins.


Step 4 - Filling Molds
Slowly and carefully pour your casting material into your molds.


Step 5 - Powder
I coated the resin I used with baby powder so I could handle them while they were still a little soft. On a clear, sunny day it took about 20 minutes to get to a semi-solid state I could handle.


Step 6 - De-molding
I used a toothpick to help pry out the casting from the mold. Since I used a clay, it wasn't very flexible so I had to work with them while they were still curing.


Continues ...
 

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Step 7 -Finish Cure
I set the castings out for another 20 minutes to finish curing in the sun. I trim any over spill at this point since cutting them fully cured could break them if your not careful.


Step 8 - Storing
After they are done, I place them in a plastic bag with some baby power to keep any from sticking if any aren't quite cured.


Step 9 - Base Paint
When ready, clean off your casting (if you used any powder) and paint a flat black base coat. Paint both sides and the edges. It took only 1 coat but feel free to add another if your paint seems a little thin.


UPDATE: Since this tutorial I've changed it just a bit. You can add an oil base paint to the casting resin to skip this step.

Step 10 - Detailing
I used a Metallic Wax and rubbed it with my finger over the face of the casting to bring out the details. Use more or less depending on how much detail you want to highlight.


Step 11 - Sealing
After you have detailed your casting, you'll want to seal the surface so nothing rubs off. I used a gloss spray sealer.


Hope this helps any of you wanting to make some "better looking" pirate treasure.
 

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Great looking coins! Looks very authentic.
 

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Looks really good. Since your replicas look so authentic I'd use real gold and silver leaf instead of the rub and buff.
 

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Another option for the highlights might be to use the paste they make for highlighting letter seals.

http://www.amazon.com/Baroque-Art-Gilders-Paste-Highlight/dp/B0053SHIB8

Secondarily, they make metallic glue sticks.

http://www.amazon.com/Silver-Metallic-Faux-Stick-sticks/dp/B00AF0M9NG

They're not entirely inexpensive, but you could create a two part mold that would give you a two-sided replica coin. Rub a little black shoe polish on it and you've got your highlights to make the coin really pop.
 

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Excellent tutorial and great money saving idea , they looked so good and better than manufactured coins i have seen .
 
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