A question on varnish

[Bortig the Viking]

Hi all, have finished my tank all done in Vallejo Matt varnish, have now washed and weathered with pigments. What's the best way to seal it all in without altering the effects, have used polished metal pigment for example, just want to make sure it all stays on the model and not on my hands, want to just make it clear and sealed. Any help appreciated, my ability moves forward two steps then sometimes a step backwards, still getting my head round it all.

 

[Bortig the Viking]

Cracked it.