What do you guys use to get into the tricky spots? Can you get drill attatchments?

Been working on a two story addition to the workshop for extra space. Got the floors in today. Took to one of the doors with a grinder and came up good. Any recomendations for rust protection after removing paint? Just a standard epoxy primer would be ok?

Use a etch primer on bare metal and then squirt on ur regular primer.
I recommend a 2pk etch as it will seal the metal from moisture and can be left for months.
Keep the pics coming
Cheers