Vallejo White is IMO a better paint, Coverage is smoother and using it as a mix in paint has not shown any \"chalky\" tendencies.
One thing I do like as well, is Vallejo\'s White Glaze. This can really improve pale highlights, but again like varnishes this does need a dedicated brush to prevent colour contamination.
@goblinLB: Please use punctuation when replying in the forums. It makes your comments easier to read and helps \'English as a Second Language\' members comprehend what you are saying.