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Step 2Mixing the bondo resin
Here comes the fun part mixing up the bondo resin. This stuff reeks, so do it in a well ventilated area and you might want to wear a respirator I wouldn't recommend breathing it in. I like to set up a fan behind me blowing towards my work area to blow the fumes away from me. You are going to Guestimate how much sand would fill up the entire mold and roughly measure that volume of sand in ounces to determine how much of the mix you need to fill the mold. So now based on that measurement you want 60% sand and 40% bondo mix.
The first thing you want to do is mix the resin and the fixing agent one drop at a time before adding the sand. It is important to measure the volume of resin carefully so that you can calculate the right amount of fixer to add. The more fixer you add the faster the holds will setup. I generally use the amount suggested but try not to use less.
Now you need to work FAST, the clock is ticking as you only have about 15mins before the resin begins to set and harden!
If you want to add some color to your holds now is the time, acrylic paint works best and you want to add this in before the sand as well. Make sure you get creative :)
One you have all this done and you are set to go on pouring the sand in you want to do this slowly. You want to stir as your pour it in to avoid getting clumps or pockets of dry sand. The sand grains need to all get wet by the mix. The 60/40 mix is a good guideline but keep adding sand until it seems as if more sand would make the mix to dry to work with.
The first thing you want to do is mix the resin and the fixing agent one drop at a time before adding the sand. It is important to measure the volume of resin carefully so that you can calculate the right amount of fixer to add. The more fixer you add the faster the holds will setup. I generally use the amount suggested but try not to use less.
Now you need to work FAST, the clock is ticking as you only have about 15mins before the resin begins to set and harden!
If you want to add some color to your holds now is the time, acrylic paint works best and you want to add this in before the sand as well. Make sure you get creative :)
One you have all this done and you are set to go on pouring the sand in you want to do this slowly. You want to stir as your pour it in to avoid getting clumps or pockets of dry sand. The sand grains need to all get wet by the mix. The 60/40 mix is a good guideline but keep adding sand until it seems as if more sand would make the mix to dry to work with.
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I assume polyester resin has been used here as it's cheapest and generally suitable for casting,laminating,fibreglass,pouring,hand lay up etc.
"hardener" is also called catalyst and for polyester resin its name is MEKP - MethylEthylKeton Peroxide, mixing ratio is usually 100:2 -100parts of poly resin and 2 parts of MEKP BY WEIGHT,this is important when mixing bigger batch ,I am using ratio of 100:1 - 100:5, 100:1 when working on hot day with pure resin /no fillers,no sand,no pigments/ 100:5 when working on cold day,resin filled with lot of pigments+fillers...
MEKP is strong oxidizer so please wear eye protection,it can cause instant blindness.