Thanks for the response everyone, my main aim was to use FM as the final finish for which I approached Ed Clayman to advise me for the base, he said it should be glassed.

So for glassing I referred to Randy Carranza https://www.youtube.com/watch?v=aAqlDcfqRcw glassing process, he used minwax polycrylic for glassing since it is water based and 80% of the water is evaporated making it lighter, but he did painted it afterwards not FM.
I am a bit confused now, so I should not glass it and just use primer + Sanding + FM??? cause I was using primer on the glassing then FM.. Sorry guys for being ignorant, just bear with me a little longer.

Once again thanks for responding.