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Hi Nicholas,
My normal routine is melamine as per Phil Darts method....
Once turned and sanded I burnish with shavings, them wipe on Melamine laquer with a blue paper towel turning the lathe by hand. Leave to dry a couple of minutes, burnish with a clean towel and re apply another coat.....3-5 coats....if you put the prep in the results will show.
Melamine will harden fully overnight, but you can assemble pens before if your careful....
I have been trying Rubio monocoat which is very easy to apply and gives good results, but is best left alone to fully dry...