The boss is always watching costs and won't pass me paint. So I care ss much as he does.
These are the long term test models and I do not predict great results in endurance. No matter as if they go a good five yeats before rusting to dust it takes a half hour to rebuild each.
If you bother to try making these take a bit of caulk and smear it over the screws on the bulb base as insulation. Avoid shorts if insects and debris gets between the tin and the screws.