Stop plucking. If they were very fine, isolated hairs and there was no hormonal stimulation plucking might be OK and might even make the hair growth weaker. The fact that you've got extensive hair growth elsewhere (even though it's fine but long) and the fact the chin hair is coarse indicates that what's on your chin is hormonally stimulated. When you pluck it, the trauma will cause blood to rush to the hair root and surrounding area, bringing with it extra androgens which will not only tend to heal the root but to stimulate growth and coarsening of surrounding hairs.

What's happening to your chin is simply that beard growth is starting. Your facial area is, like that of a large number of women, able to respond to stimulation by testosterone and your hormonal balance must be such that you have high levels of "free" or "unbound" testosterone. If you can get your levels of free testosterone down to the range that's normal for a female and keep them there by medication, then you could try electrolysis. The fact that the bristles are light-colored means that laser isn't a great idea and unlikely to work well.

If you don't go onto constant medication, you can consider the temporary methods of dealing with unwanted hair.

Remember that this is coarse, hormonally-stimulated, beard growth, so that makes plucking, waxing, epilating, tweezing, threading etc. a bad idea for the reasons already explained.

Remember too that hair and skin are very similar in composition, so that what will destroy hair is damaging to skin. Chemical depilatories strong enough to destroy coarse beard growth will almost certainly seriously damage skin in the long term.

Vaniqa only slows the growth a bit for some people. You still need to keep removing the hair.

Bleaching is irrelevant if the hair is blonde anyway.

I think your best answer by far is actually to shave it. If you get a men's-type Norleco electric razor you'll find that it actually does a "lift and cut" exercise which results in the hair being cut at a level which ends up just under the surface of the skin, so your face is left totally smooth. It only takes seconds to use.

Hope this helps you end the "bristly chin" feeling.

Well, over the years, I have waxed & tweezed. But now I have been tweezing & I must say the hairs are getting less & finer. The best thing I ever bought for myself is at Bed, Bath & Beyond or a beauty supply place is a 15X lighted magnification mirror. It is so fantastic. Now I know that the other person who replied said to shave with an electric razor, but I can tell you my sister started doing this & when she did all the hairs became stiff, so I never did it. Of course once you start shaving, you can stop & just wait start plucking again any time you want & it will break the cycle. You'll have to make up your own mind, but with that mirror, I can get them so short that I onlky have to tweeze once a day. Hope this helps!