Nitromors used to contain dichloromethane which is the stuff you want to really strip the paint
You can still buy Nitromors old recipe by other trade brands as we use it at work.
But cant be used or even bought without undertaking specific training to use it.
I remember it melting through my gloves when I did my rocker cover with an alternative stronger than old nitromors (evil stuff but worked great)
The new legislation for any that are interested:
As of 6th December 2011 due to European Regulation No. 276/2010, Paint Strippers containing Dichloromethane (DCM) are only available for sale to Professional Users and used in Industrial Installations (proof will be required).
The use of DCM based paint strippers by Professionals outside industrial installations, ie on site or in workshop premises is only possible after the user has completed and passed a training course that conforms to the requirements of the HSE REACH Enforcement Regulations 2008.