West system epoxy

I would like to know if I should use the 105/207 resin on the shearwater hybrid  and if you use the 207 from start to finish

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RE: West system epoxy

My limited experience with MAS and West 105/207 is I prefer the West 105/207 for parts that will be varnished.  The 207 seems to penetrate a lot more than the MAS.  The MAS seems to set on top without much absorption.  

RE: West system epoxy

I use 207 on parts that will be exposed to sun, including glass sheathing on exposed surfaces. 206 0r faster 205 is fine for other tasks, and you can use any WEST resin hardener mix over another. 

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