There are a few things that are guaranteed to grab my attention at thrift stores, estate sales and even side-of-road drive-bys: Headboards, doorknobs and anything typographical (letters and numbers). This coat rack happily combines all three and was pretty easy to put together. The hardest part was putting up with the stinky epoxy stuff.
It can take more than you think for some knobs, so don't be discouraged! When it's mostly full, carefully push the screw-end of the hanger bolt into the opening. The epoxy dries quickly, so you shouldn't have to hold the bolt in place for more than a minute or two.
*NOTE: A curious thing happened when I filled a couple of brass knobs for another project - the knobs got really really HOT. So hot that I had to put them on a potholder and wait about 15 minutes. It must've been a reaction between whatever is in the epoxy and the brass. The porcelain and wood knobs I've done haven't gotten hot, but just be aware that it's a possibility.
The fun part ~ putting them together:
Drill holes where you previously marked the headboard to accommodate the bolts in your door knobs. Thread the knobs in and secure them in the back with the nuts. Nail or screw in your house numbers in the order you want and attach the D-Rings to the back for hanging.
Now you have a unique coat rack that successfully combines several different kinds of vintage parts into one beautiful (and useful) item!
See ya later ~