No experience with Epifanes Clear but I used Epifanes RapidClear on my Goat and highly recommend it.  It is a semi-gloss that can be recoated in 5 hours with no sanding between coats.  I put 5 coats on the interior in 7 hours total time over 2.5 days.  It is available from Jamestown Distributors if you cant get it locally.

   A good place to start:

https://www.clcboats.com/shoptips/finishing-tips/varnished_kayak.html

   Thanks for that video link - I hadn't looked at the kayak videos...

I already have the Epifanes clear varnish, but still wondering whether to thin or not?

During OkoumeFest the varnishing instructor said the preliminary thinning was unneccesary over epoxy.

All the guides I've read on varnishing say that thinning of the initial coats is to economize when the varnish is penetrating into the wood. The thinner mix allows better penetration and it's more economical to let the wood soak up 50% varnish than 100% varnish. Obviously "soaking into the wood" is not a factor when you're varnishing epoxy.

Thank you so much for your reply, Chenier!

That's what I thought might be the case, but really wanted confirmation before forging ahead!

Thanks again,

P

   i used the epifanes clear varnish.  it is quite thick out of the can, so i thinned with about 2 to 1 with epifanes thinner.  it went on very well.  if you're in a hurry, i woulld check at your local West Marine.  mine stocks the epifanes thinner.