Since this is brand new leather, how important is the cleaning
process, or could it be skipped this time without dire results?
To reapply a new topcoat; technically it has to done onto the original; nothing should be in-between to cause an adhesion problem; be it micron layers of soiling or unknown aftermarket conditioner; otherwise it has to be stripped clean to the original tannery finish. You decide!
In your reply you mentioned hydrating and fatliquoring if the leather is absorbent. How do I determine if this is needed?
By looking at the leather texture to see of wrinkles or creases; by testing with water droplets to see how fast the absorbent rate comparing the unexposed with the exposed areas; by comparing the shade of the color between exposed and hidden will also tell the dryness of the leather.
A healthy leather moisture level should average 15% when it’s dry, otherwise it’s time to top up; and this is mostly from the fatliquor (fat, oil and water). It’s this lifeblood of leather that gives the leather its characteristic suppleness not found in any other material.
Besides it also plays an important role in the feel, handle, softness, thickness that also affects the shade of the aniline color.
I don't have an airbrush. I do have an HVLP paint spraying system. Is
this suitable for the 79G? Alternately I assume I can wipe the
material on at the risk of some streaking?
It would depend how grainy the texture is; application can be from a foam brush to a better plush brush to compressed air spraying. However from experience spraying will give a better shine due to fine deposition of the finish.
I'd need enough to do a couch and love.
It would depend on how absorbent the finish is and how many layers you wish to apply to your custom satisfaction. On average two quarts would be enough, for there are exceptions too! Don’t forget the leather needs to breath for seating comfort! And absorbency is as good as breathability; for the leather to self regulates through transpiration; the taking and releasing moisture from and to the atmosphere.
I suggest you post some pictures!
Roger Koh
[email protected]