Difficult sanding poly topcoat
Hi All,
Would love some advice please. Doing my first epoxy floor. Metallic effect. The epoxy bit was easy. Looks brilliant. Great finish. My issue is with the poly topcoat. Used a 2 part polyurethane, same manufacturer as the epoxy. Mixed with an anti-slip additive as per instructions.
When I was rolling it out it was leaving some roller marks. Presumably I was rolling it on too thick? Now it's dried there is a combo of roller marks and what feels like the anti-slip additive? Problem is it won't sand back. It's been a week, it feels solid. I tried to sand after a few days and it gummed up the sander. Not doing that anymore but it just won't sand down. Using 80G with a drywall sander.
Think I rolled the poly too thick having done a timber floor before. The poly looked exactly the same when rolling, but then presumably with the timber it absorbed a bit and so smoothed out really nicely and buffed easily after.
Any suggestions? Do I just need to wait even longer until it cures further then try again?
Thanks in advance