Selling in the pits on trackdays?

[PlayFair]

Hi guys,

Just had an odd thought. Is there anything against selling/marketing in the pits on trackdays?
For example if you sold car bits (tyres/brake pads/tow straps etc etc)
When I done my last track day at Mallory there was nothing. And had I needed something such as pads or fluid, I would have been stuffed.

Would it be a case of contacting the track or the company running the trackday?

[PlayFair]

Yes sorry I meant paddock area.

Just thinking of an idea if i was to be doing the trackday anyways.
Could sell goods that people may need.

Not going there just to sell, just as a sideline to help people out if needed.