Bad roofs

[ReaLCoBRa 0]

Hi everyone, I'm here to ask your help about my 3d prints' roofs, which don't look good. First of all, It has been while since I last printed and I used Simplify 3d, so I'm trying to learn Cura. I have a grinder which has a roof on the underneath part, basically everything around he graphic is craved into the base. So this roofs are actually important because they are part of the aestethic of the model, however i can't understand why they get printed this way. I tried different settings and thought that 'skin'  was the problem, mainly because it was a setting i never heard of, but still I have this problem.  I tried with bridge settings and  with supports, but the texture is not good looking. Is it somethingI can't do much about or can I fix it?In the images you can see what I'm talking about, where the first was interrupted after finishing the layer. I printed many times with 1 layer of skin, than I removed it but I can't tell if it fixed anything.

 

P.s the flow rate  is at 93%