The work fine for the job.
Seems like good quality with petty stuff bristles. I generally use these to clean bbq grills - but keeping 2 in the garage for rust removal.
I bought my first one and put Blaster in it. My quick hitch on my tractor was sticking and nothing would make it work right. So I started using Blaster every day; then I thought, "What if I put powdered graphite in the Blaster". I did, and this sprayer sprayed it perfectly; that is why I bought two more.
Way cheaper than buying grill brushes.
works as advertised