Can I use a regular flashlight?

You can purchase a light table for art, such as an Artograph LightPad 920. You'll have to be somewhere dark, like a dark room or anywhere with the lights off,...

No, it's gonna smell funny, but you can use glaze or glass finish to repair it.

You could as a last resort, but this should be avoided since human shampoo can cause a dog's skin to become irritated. Dog shampoo can be purchased for $2-$5 at...

You can. 1 teaspoon of table salt = about 2 ¼ teaspoons of kosher salt, so substitute as necessary.

That should be fine. They both are made up of NaCl. Table salt does have added iodine, but that shouldn't matter for this.

No. Powdered milk is dry, and milk is wet. If you add milk to it, it will get soggier.

You can experience some added benefits from a regular conditioner by leaving it on longer and adding heat. However, a true deep conditioner has richer oils in a higher concentration...

No. If you put the mug in the dishwasher, there is a high probability the paint will come off.

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Yes, just be very sparing with it. You won't need more than a few drops.