From sketchUp to milled aluminum

I have made my SketchUp model and I want to get the part milled out of aluminum. I have contacted 2 engineering companies who have asked for the file in SolidWorks format, or IGES or STEP. I have tried a number of ways of converting the skp file which takes a number of conversion steps but with limited success. The model appears to get distorted, some edges look odd. I wondered if any one had had any success having items milled from being designed in SketchUp and what procedure you followed??

I hope somebody else could help you in this query.
Take care…

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