help with sponsons

i am installing sponsons and i want to use epoxy resin not 5200.. i heard 5200 looks crappy after a few rides..
i was wondering if anyone knows how much white pigment to put in the epoxy and also how much cabosil. i have never put sponsons on before... i also counter sunk 8 stainless tapered screws for each sponson.. any tips would be greatly appreciated. thanks
 
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