You sound like a careful person. It is not absolutely necessary that you get your Charisma towels serged. Just fold them carefully so that only the soft portion of the towel comes into contact with the paint. You get four sides per towel, plenty for removing wax or polish from your car.
The Charisma towels are my choice for this, and are recommended by many here. Just make sure you never use ANY fabric softener when you wash them. Bleach and liquid detergent is fine, just no fabric softener or dryer sheets - unless you are going to dry yourself off with it!
Get white towels only. Leaves no dye behind and easy to see when it is dirty.
Wash after every use, and only use the towel for one thing at a time (removing polish, removing wax, drying, whatever.) I got 4 of these locally and have washed them at least a dozen times already.
I love MF towels for QD'ing and interior detailing, glass, and household uses. The Charisma towels are fine for this, too. You may want to get a few Charisma hand towels for door jambs, wheels, and the like. Same thing applies, use the soft areas only.
Certainly having your towels cut and serged would be great! Just make sure they use 100% cotton thread when doing so. Otherwise, you are wasting your time. 100% thread is not normally available at most stores - you may have to mail order it or order the towels "pre-serged".
Just my humble opinion!:bounce