Thank you, josh!
I will try 400 first, and see how it will come out. It has some air pockets on the surface, but I will keep them, otherwise I will need to sand down a few mms 
I will use a pam oil next time and epoxy I thought that the resin would smell when cured, luckily there is no smell at all, except some oregano oil that i mixed into it. It somewhat reminds me of amber that i really like…
Thanks, again!