An old domestic machine will likely sew about anything that you can get under the needle. The motor may or may not be strong enough - you may have to hand turn it. You may have to increase pressure foot tension. Some times even with the right neede, the needle will pull the leather up when it comes up unless you have enough pressure to hold the material you are using down. Some do not have a strong enough spring. The machines with bigger hand wheels work the best IMHO - but then I've tried it...