There are many places online that will make you custom satin tags to sew into your projects. They can put all the washing instruction symbols on them, and then you can just use a marker to show which ones NOT to do. You can also have something nice on them like "handmade especially for you by (your name here)".
Now they can be expensive, maybe $100 but you get anywhere from a few hundred to 1000 tags.
Also: If you have a serger(sp?) you can make tags on that as well.