its better to let the workers do their work easily and slowly, in this hot weather its better to have quality work slowly rather than making accidental mistakes in hurry, sometimes fasting do that to you.
Also i dont know if you have plans for selling it later but I usually tell my friends when they are on projects like this that remember the hard work and money youve spent on the car.. whats the point in doing all this hard work when you have plans to sell it off later. ill give the same suggestion to you too bro, never ever sell it 