WARNING - Extremely nerdy post incoming.
Detailing brushes, an important tools to have for both interior and exterior cleaning.
Firstly, wheel nut brushes. We all like clean nuts! (Sorry, I just felt compelled to make that crude joke.) These two are ideal for wheels, not too big and not too small. At this point I would recommend avoiding wooden handled brushes as the moisture inherent in the job at hand degrades the handle. As you can see in the pic above, this one has not worn well. The yellow version is from Chemical Guys, I would say this is one of the brushes I use the most.
https://www.chemguys.com.au/Premium-...-p/acc_s91.htm
Next are what I call my workhorse brushes. These boars hair brushes are great for a variety of tasks including wheel cleaning, engine bays, exterior cleaning and interior detailing on harder surfaces. The blue ones are from Bowden's and the red ones from Waxit. They can even be used to apply tyre dressing. Again, plastic handles my preference for durability. Notice the similarities between the two brands.
https://www.bowdensown.com.au/the-foursome
https://www.waxit.com.au/collections...ling-brush-set
It's also important to have some softer brushes for delicate interior and exterior surfaces. These Detail Factory brushes are made with ultra-soft synthetic bristles. I use the short red version for interior work, the blue for exteriors.
https://detailingshed.com.au/collect...31620523065483
https://detailingshed.com.au/product...37240027545759
Upholstery brushes are helpful additions, one for carpet and cloth, and one for leather trim. Use the red version for loosening stains or agitating carpet prior to vacuuming. The leather brush is soft enough to prevent damage but helpful for increasing the effectiveness of a leather cleaner.
https://www.waxit.com.au/collections...holstery-brush
https://detailingshed.com.au/collect...-leather-brush
And if that wasn't enough, these Vikan brushes are designed for reaching into the depths of engine bays.
https://www.waxit.com.au/collections...ngle-brush-kit
Now after all that, there is still wheel, tyre and wheel arch brushes to consider. That is another deep, deep hole in which deserves another post for another time.