West system 207 on 205 ?

Hi,
I'm getting towards the end of my build and have decided to go with an epoxy/spar varnish combo for surfacing. My question is, can I do a couple of coats with 205 hardener then finish with one of 207 hardener? Is there any advantage/disadvantage to this - besides cost?
My sides will be stained wood, the top painted.
Thanks!
I'm getting towards the end of my build and have decided to go with an epoxy/spar varnish combo for surfacing. My question is, can I do a couple of coats with 205 hardener then finish with one of 207 hardener? Is there any advantage/disadvantage to this - besides cost?
My sides will be stained wood, the top painted.
Thanks!