Iains wrote: Most places a construction in MS Word can be polished proofread and then pasted

As it can on Mudcat:
Paste from MS Word into the reply box, then:
Below the reply box click on 'preview' before hitting submit.
You can then see how your post will appear, and make any corrections in the reply box before previewing again.
Only hit submit (without preview) once you are happy with the result.