I've sewn metallic and I've sewn FSL. I would not try to combine the two because of constant thread breakage issues. If you really want to accomplish this challenge, splurge on the expensive Floriani metallic thread that is encased in Mylar or something, so does stitch very well. Accomplish stitching the FSL with regular and you will feel sooo clever.

I have done lots and lots of FSL,but never tried metallic. I think I will stay away from it. The designs are usually very dense. If I had wanted sparkle on them I used other mediums like iridescent glaces etc.

I have done lots of FSL using metallic thread and I use it in both the top and bobbin...I would suggest that you use the woven WSS (not the one that looks like plastic) and also either an embroidery, topstitch or metallic needle as they have a larger eye than a normal needle...also, if using a small spool, it runs better if you can set it up so the thread spools off from the side (like a roll of TP)..it will help the thread not to twist...some have luck running the top metallic thread through a packing peanut to help keep it running smooth...there have been lots of threads about using metallic threads in the past...hoping another Cutie can post a link for you...

Edit: Here is another link for using metallic threads...

I was given loads of great advice when I asked about using metallic thread and FSL. Have added link below

I don't use metallic thread in the bobbin as it doesn't unwind well in a bobbin. the bobbins, and hook on my machine are all plastic so I worry that the thread would damage them over time.

I remember someone also saying they do the underlay in ordinary embroidery thread and the rest in metallic with great success.

Edited to add that the brand of metallic thread you use makes a big difference.

I love FSL, but would not recommend using metallic thread in your first project. However, if you have used metallic thread in previous projects and feel confident, then go for it.

Thank you all for the great advice. I made one with metallic thread and one without. I think the one without turned out better. Thank you all again.

My experience with metallic thread is very negative. Iwont even think about using it to do FSL