hi, check this thread out!!!
http://www.finescale.com/fsm/community/forum/topic.asp?TOPIC_ID=16901
I didnt weather it, but what i did is this........ i sanded all the seams, and the rest is out of box. I just took my time and made sure i didnt have any glue showing,. Just take your time. Its a great kit. This was my first armor build. I painted the whole thing with Tamiya olive drab.
Once piece of advice, that was offered to me by hte judges was this..... because this tank was designed to be motorized, there are holes in the bootm of the chassis, Take some flat styrene and fill those in, putty it, and sand it smooth. If i did that i would have mosdt likley took first.
Hope this helps a little!!!