And the tools required for those tasks are a paint brush and a roller, and a shovel/rake.Good luck man.

If his contract covers labor only, you probably are responsible for roller covers and some portion of paint brushes and/or spray tips, etc. 

(Had a young tenant who put gas in an ice cream plastic bucket with a lid to clean paint brushes!

I recommend everyone read this, there's data against hot tubs, sump pumps draining into septic systems and yes even water from latex and other paint brushes going into the septic.

I'm the painter for our properties and I can be standing there showing a rental with a dripping roller/paint brush in my hand and about half the folks under a certain age will ask "can we paint?"

The school of hard knocks (getting stuck with a hammer or paint brush in my hand, whenever a carpenter disappeared on me) was invaluable and nothing, I mean NOTHING, can teach you as being immersed in it.

@Mike Milano The question is not about the safety of application, the question behind the question is: will this primer "seal in place" the lead paint without any EPA violation against the lead being friable, also will it not disturb that lead paint/chip when it is applied, I know for a fact that rollers and paint brushes can chip out paint especially when epoxy or even simply paint is applied, there is a viscosity factor when you start applying it, therefore if you have a chipped paint and you roll it with something viscous, then you are potentially spreading the lead based paint.

I've been involved with my family's SFRs since I could hold a paint brush, and now generally have the reins.

You might be standing there with a dripping paint brush in your hand and a certain number of folks viewing the place will ask you "can I paint?".

I still use lots of "guys with lawnmowers, shovels, and paintbrushes" when the situation warrants.