I recently anodized two lowers at home - it was pretty easy. Just follow the general concepts for the "LCD Method" (search at Caswell Plating).
For the power supply, I used a 5A/24V switching supply from eBay. I originally purchased it for electrolytic etching, but it provided more than enough current density to do one lower at a time.
General process I used was:
- Blast lowers to an even matte finish.
- Deoxidize using Caswell's solution.
- Rinse with distilled water.
- Set up sulfuric acid bath (composition per Caswell LCD method). Sulfuric acid used was battery acid from local O'Reilly Auto. I used a fish tank air pump to provide agitation, lead sheet for the cathode, and titanium wire to hold the lowers. The latter two were purchased from Caswell.
- Rack part and begin anodizing.
- Rinse part with distilled water.
- Transfer to dye bath. Good dyes (i.e. ones specifically for anodizing) should be used.
- Rinse with distilled water.
- Seal in boiling water.
Results are below. I'm in the process of refinishing the orange one because of those spots.