For those with decks that have spindle rail systems…you would probably rather have root canal than brush those spindles out with stain. (See the above before photo.) Here is another case where a quick scuff and vac gets your ready to roll out the HVLP and save yourself a weekend or two.
Deck stain products are low viscosity (thin) and spray very easily through a good turbine system. They are also available in waterborne formulations these days. Even if you are committed to oil stain, the cleanup will take a few more minutes, but think of the pile of hours you are saving by spraying. While you are at it, spray out any lattice work that you may have on the property. Another case of HVLP to the rescue.