I know this is a old thread but I'm sure it's still an ongoing problem. So I spent hours googling and reading on how to apply without brushstrokes and bubbles. Well I tried everything. I spend hours applying sanding applying again and so on. Bubbles and brushstroks were ongoing. Finally I tried a kitchen sponge. Got it wet first, wringed it out and dipped it in the poly and applied it that way. NO bubbles or brush lines finally. DONT use the sponge on a stick. Bubbles are worse. Just a cheap dish sponge.

On Mon, 4 Jul 2016 15:04:39 -0700 (PDT),
wrote:

I know this is a old thread but I'm sure it's still an ongoing problem. So I spent hours googling and reading on how to apply without brushstrokes and bubbles. Well I tried everything. I spend hours applying sanding applying again and so on. Bubbles and brushstroks were ongoing. Finally I tried a kitchen sponge. Got it wet first, wringed it out and dipped it in the poly and applied it that way. NO bubbles or brush lines finally. DONT use the sponge on a stick. Bubbles are worse. Just a cheap dish sponge.
The foam paint brushes work just fine if you saturate them first -
either with water or poly. Get all the air out of the foam, then lay
the poly on smoothl;y