ABS objects are printed very well except for the topside!

Hi, I am using a bed of 80C and extruder at 245. These settings (together with all others) gives the best results here except for the top. So at the end the surface is not smooth on top.
Any ideas?

Ps. I have the absolute best and cheapes solution in order to prevent objects from curling from the bed. If you are curious, please respond. 100% guarantee and never read about this. Better than the Vertex sheet!

If you have the K8200 try putting 6 solid layers on the top.
You can find this in the slicer configuration Printer settings top and bottom layers

Thanks for the tip! I will try this right away!!
To be continued…