> i am wondering if it is necessary to use west system 207 clear hardener on
> both the inside and outside of my guillemot?

West does not recommend using 206 hardner for clear coating applications. It would be fine on the inside (no UV) but not the best choice for the outside. But, the 206 will work on the outside - many a canoe has been clear coated with 206. I would be a little concerned about clouding. The 207 has additional UV inhibitors, but still needs a varnish topcoat.

> their is a considerable difference in price between the 207(clear) and
> the 206 hardeners , you get slightly more with 207 due to 3:1 mix ratio

Actually not as significant as it first appears - it is more expensive, but based on local (Halifax, NS) prices for a B-pack (in Canuck Bucks):

105/206 - 1.20 Gal Total - $125.90 or $105/gal

105/207 - 1.31 Gal Total - $149.90 or $114/gal

> is it worth it to use 207 on the out and 206 on the in?

> any advise appreciated

> craig, ont can

If you using West System, I would recommend you at least go with the 207 for the outside. There are a LOT of hours invested in a kayak - too many in my opinion to risk potential clouding down the line because you used a product in an application that the manufacturer does not recommend.

Regards,

Mike, ns can