I haven't worked with fiberglass repair before, but I already had some fiberglass fabric mesh and I picked up a small can of the repair patch. It's a two-part mix, and actually mixes a lot like automotive filler, and you can find it at auto parts stores. You just follow the directions to add some hardener to this jelly and mix well.
I sanded along the edges of the broken area's and knocked down the couple layers of paint that had been used on it over the years.
On the inside bottom I found the Kimball trademark stamping, but I knew it would have to be sacrificed to patch the breaks.
Next I cut a piece of the fabric mesh and cut some notches along the sides of the mesh so it would conform better to the bullet shape. You can also buy this stuff at auto parts stores. It's usually sitting near the auto body bondo patch kits.
Once I got the fabric the way I wanted it, I mixed and applied the patch. It spreads like peanut butter. I then added the fabric mesh and coated over it with more of the patch. It dries in less than 30 minutes, and gets rock hard. Once the inside patch had hardened,
I cut a couple of small pieces of fabric and repeated the process along the edges of the cracks still visible on the bottom of the outside.
Then I used some very coarse sandpaper (80 grit, but 40 would have been even better) to knock down the rough edges of the patch. Your goal when spreading the patch is to get it as smooth as you can before it hardens, so there's less sanding to do to smooth out everything later.
I limited my sanding to the outside only and saved myself some time. Since the inside will be covered with dirt, I figured I would save the effort for other projects. It's not like you can read the embossed Kimball seal anyway since it's covered up.
Outside of planter with rough sanding almost done.
Outside bottom of planter sanded, giving it an appearance similar to the top of my head.
With the outside sanded well all over, all I had to do was pick the right paint color.
I already had a can of red paint for painting plastic, and the directions say it also works on fiberglass. Sweet, here we go!
Looks pretty good. We picked up some cacti (cactuses?) to plant in this reloaded bullet.
Cacti are planted, now (I'm told by SWMBO) we just need to add some sedum and it's done!