Artisan -> polyreduce: little strange result

[derei]

I downloaded a model from 3dwarehouse This is the model and operated Polygon Reduction from Artisan Plugin.
At first I operated a 30% reduction and the result was good, but with significant mesh problems. I corrected it (about one hour of work) and then I ran another reduction (80%, because I lost my patience to do it in small steps) and here is the result... overall, it needs some adjustments to be ok.

I don't know if this is the result that should be after a polyreduction, or the model is bad, or... the algorithm
Please help me with this. Thanks.

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this is the file after a 30% reduction and corrected

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second reduction (80%) and raw (I didn't touch the mesh -or should I say "mess")

[bigstick]

Wouldn't it be a whole lot easier to post your request on the Artisan forum?

[derei]

@bigstick said:

Wouldn't it be a whole lot easier to post your request on the Artisan forum?

I had no idea that is one !