Can you use acrylic paints on plastic?

I think acrylic paint with water mixed in would work well here.

An easy way is to use a mixture of water, vinegar, soda and dish washing liquid. Rub the paint brush gently and you will get desirable results.

You can use acrylic but you will not get the best results. The acrylic paint will harden the shirt and likely come off in the wash.

Yes. It should work just fine. Because it's a porous material, the paint should not rub or wash off.

No, the table cloth is not strong enough and will rip. Also, it is likely not long enough.

Most offer an easy push-to-eject function that, if pushed just right, will allow the foot to come out without breaking. Give it a little more force, and with the end...

Try using a pair of pliers on the plastic and a screw driver on the screw. Turn screw counterclockwise to remove. Repeat for each screw.

It shouldn't be a problem. Usually D string magnets are raised higher than the others.