Stop in for a cup of coffee

So.. for my bodywork i used UPOL fantastic glass which is filler with fiber hair... it spreads decent but i'm getting down to just flattening it out for final primer.. should i switch to a straight polyester filler?

I did have a new can of bondo "Hair" and **** that ****.. came out of the can in a ball and couldn't even mix it.. just horrible.. kinda love everything Upol i have tried