You can just dilute it. Addition of cyclopentanone 2% w/w should be enough.

I assume that you use spincoater to spread it. So, it depends on the spinning speed, however the temperature of the resin has a great imapct on the viscosity so I would recommend to use it at room temperature. Also, the dilution could be a good idea but you have to make sure that it won't modify the properties of the resin in order to have to results.