I have been a hgv mechanc for nearly 40 years, every day you learn something new, the amount of tools you need is scary.
The amount of skills you need is also scary, fix shti your boos cannot, yes all day long, cut bearing track off stub axles...
You could also try cutting a slot in the thread along the length of a spare bolt and run that through, helps to scrape out the crud in the female thread.