I have a chance to buy thread new never used still in plastic for 10 cents a spool and 20 cents for the larger ones my dilemma is that it is all 100 %polyester thread . She does have a few spools of coated polyester thread. I was wondering your thoughts on the subject. So far I have been told to use 100% cotton thread so not sure if it is a wise investment for me. Please give me your thoughts on this matter...the thread is coming from a fabric store that has gone out of business.