I have glassed and used liquid sheeting. I do not care for the liquid sheeting. It does not flow well at all. It is a very hard surface when finished but also hard to sand. I have had much better results with glassing. I have not tried LS on balsa just on foam, so I do not know how it will work on balsa. I also received a email from the supplier after I purchased and used my LS stating that it was now improved? Just my 2 cents. Hope it helps.