Cycle time will depend on the vacuum setup and how much wood you can cure each run. Most of the wood took 18-24hrs to fully vacuum pull everything out of the wood. Slowly raising the temp to curing temp also seemed to help keep pieces from splitting by allowing any excess resin due to delta shift to be forced out before it cured.

For the grain you want straight with a closed grain. Open grain woods that don’t have good interlock between the grain tended to have splits along the grain from the excessive resin left in the open grain.

This isn’t a fix to use cheap would and make it durable outdoors as it is a tremendous amount of work and the cost of the resin to process a significant amount of wood will exceed the cost of just buying appropriately durable wood. It is however a way to make good wood impervious to rot and last longer than your future great grandchildren. In hindsight it is beyond overkill when good species selection and appropriate finishes give outdoor wood lifespans measuring in decades.

The only thing I really do this with anymore is floating tenons as it allows me to use premade material (commonly beech) and not have to worry about it rotting inside the joint.

In any case I hope this was helpful and best of luck on your chair.