I am on my 3rd, 5 lb. bag of
micro. I will need 1 more bag for a total of 20 lbs of
micro for a Cozy MKIV (I am not
applying micro to the interior), so I think 1
of your 28 lb bags should be enough for your Long-EZ.
I have sanded off most of that
micro.
Im assuming you mean the ENTIRE interior ... but you will need to
use micro everywhere ( that shows anyway) that you used tapes on.
Otherwise you will see every splice and tape seam after painting, ,
even with Zoelatone.