What kind of appearance does 丰泽的肌肤 have？
'丰' in '丰泽' means '丰滿' (plump/ full) or '丰富'(rich)

'泽' in '丰泽' means '润泽 (moist) or 光泽' (Shiny)

I would say '肌肤丰泽' means '肌肤丰滿而有光泽' (full body with shiny skin)

宝钗 is a healthy looking lady with shiny skin, while 林黛玉 is a thin and pale girl

'full' here doesn't mean 'fat', it means ' plump and bouncy' (丰满而有弹性)