Have you read the thread on styling tables I referenced above
http://forum.weavertheme.com/discussion/8616/tables-versus-divs-how-to-style-tables-in-weaver
Especially
A) Use inline CSS styling with CSS rules in an HTML Style attribute.
and
B) Use classes (for settings that may be shared) or IDs (for unique ones) and custom CSS rules.
As they detail exactly how to apply your style to your table elements.
If there is any part of that tutorial you dont understand, be specific