GRASSO deeply and quickly soaks in, moisturizing and softening throughout the full thickness of the leather. Thus, it is an efficient way to help break-in new saddles, boots, baseball gloves, etc..

To break-in new leather: Apply thin coats (3 to 5 coats) over a period of about 2 weeks, letting it soak in as much as possible between coats.
When the underside of leather can also be accessed and treated, you can apply a coat of GRASSO to the underside as well. This will usually greatly accelerate the "breaking-in" process.

Notes:

1. TENDERLY makes the top layer of the leather softer to the touch and is perfect to maintain the natural softness and suppleness for thin delicate porous leathers such as lambskin, pigskin, or calfskin. However, TENDERLY doesn't do much to help break-in thick stiff leather, and that is where GRASSO actually excels.
2. The overuse of GRASSO can tip the scale and turn its advantages into problems. For example, if used every day over a period of many months, it could make the leather so soft as to lose hold and form.
3. GRASSO is oil-based and can darken some leather (mostly porous leather such as lambskin).

Generally speaking, NO. Not alone and not on light colors anyway. However, in most other situations, mixing URAD (usually colored Urad) and TENDERLY together can produce miracles and bring back to life a dead jacket!

Also see color restore kit

As always, we suggest you use caution and test it on a less visible area first.

Yes, Urad can be used both on alligator and ostrich skins. However, in both cases, there are things to be cautious about. First, these skins have uneven areas where Urad wax can build up. Second, these skins sometimes have both a non-porous thin surface layer and a thicker very porous undersurface layer. The way to avoid possible problems related to these two points is to mix Urad with Tenderly (about half and half) and spread it very thin and very quickly. Because if you spend too long going over one spot, it may wet the porous undersurface of leather too much which can result in your leather becoming darker (noticeable on lighter colored leathers). In short, use Urad and Tenderly mixed together and spread it thin and quickly. The above is what has worked best, with thousands and thousands of boots of testing! However, we have had one case of pink ostrich cowboy boots where using Urad without Tenderly was what worked best! Exceptions do exist so the above advice does not remove the general rule to always perform a test in a less visible area first.

This is not a simple question because a lot of factors are involved; type of ink, type of leather, type of leather dye, delay of intervention, intervention with other products...
In short, there is no guaranties of success when it comes to ink but here are some tips:
URAD: URAD does remove ink stains on "Corrected and Pigmented Grain" and "Full Grained Pigmented", most of the time. The trick is to use as little as possible. Just dip 1/8 of an inch of one corner of the sponge into the jar, and wipe it off the side of the jar. Now rub vigorously quickly on the ink spot.... The sponge is just a bit more abrasive that way than if you would use too much, yet there's just enough product to help dissolve the ink...
"Full Grain Aniline" has no protection at all, the ink just goes right in. For that kind of leather, I believe you will need to rub hard, almost scrub it off with one drop of URAD on one tip of the sponge. It's the scrubbing that will do most of the work so YES, there is always a risk the color will not come back completely.

AQUILA: Our leather shampoo called AQUILA can clean fresh ink stains but usually does not do better than URAD. It was made to clean body grease, not ink.

If you do not have the above products at hand, you can try a "Q-tip" with some "Isopropyl Alcohol". (Local pharmacy) Apply with the Q-tip only to the ink spot, at first, do not let sit to long. Wipe with a wet (but not too wet) cloth. If it comes off, repeat. If it does not come off, let the alcohol stand a bit longer. If that does not do it. Use nail polish remover in the same fashion.
P.S. The nail polish remover...can be a delicate operation since it can also take out the leather's dye. Use with caution.
P.S. Prevention tips: spray Sahara stainproofing when new. Then have a jar of URAD handy, just in case someone has the urge to draw a smiley face on your new $5000 sofa!
I think that prevention is worth the money!

If Urad, rubbing alcohol and nail polish remover did not remove the stain, we know if nothing that will.
Costa-Brava(dye):When cleaning does not work, you could try to hide it using URAD with color, which is not a dye but could cover the stain a bit. If you apply Urad with color, use 1 to 2 Tbls of Urad (let's say BLACK) mixed in 5oz of TENDERLY, then apply.

URAD leather cream contains no petroleum derivatives. The only URAD product that does contains petroleum derivative is GRASSO.
Grasso is made of a high concentration of Lanolin held together in a petroleum based gel.