Applying WB polyurethane: poplar and birch ply
I bought a can of WB poly (Zinsser) as my final finish for my first project . See album in my profile. I used a 50-50 Shellac (not sure if it dewaxed- I can't find the information on the can ) - denature alcohol as my stained method; work out nicely and to my liking.
Acccording to the user guide on the WB poly can:
- apply thin coat
- sand with 320 grit paper between coats
- apply min 3-4 coats
Since this is the first time I apply this product, i was wondering what is "thin coat"? Is it supposed to still look like milky or should it be thinner ( I'm acutally on the thin side ). I tried sanding with 320P grit but it seems to me this is too rough and kind of give some sanding mark even though I'm being very light on the pressure side. I don't see any mark on the subsenquent coats of poly though. Should I go with a thin grit like 600P? I apply the poly with a "rag" (it actullay a glove used to apply the poly on flooring)
Any recommandations/ advices will be appreciated !?