this is all well founded experienced advice from the forum

...the brake system (master cylinder, lines, etc.) should be fine (it just experienced stress/pressure expending the extra brake fluid= cap on or cap off-...and experiences probably even more pressure with road duty by comparison)

if you are concerned about the spotted hood pad, request the shop to put a new one it

more of concern would be if the brake fluid happened to fall on any painted surface (inside the hood or outside on the fenders!)......result: no more paint- like magic

good luck and hope everything turns out
-fad