I very rarely need to re-sand these days. I use three drops of CA (thin or super thin preferably) per section of the pen. Spray with activator whilst still revolving. If any whiteness appears ( if I’ve been heavy handed with the spray) then just wiped it off with a cloth and some boiled linseed oil. Works like magic and provides a smashing surface shine for the next coat. Tend to do 3 or four coats all in all though have done as many as ten if I’m looking to get really glasslike finish. I then usually finish off by going through micro mesh pads upto 12000.
However, I still find that melamine laquer is probably the quickest and easiest finish to apply, especially if I don’t have the time or inclination to faff around with glue! 
