I have a suede coat, which does not need cleaning, but needs renewing. Is there a spray or any applicatio I can apply to give my coat that new look again?
If it really doesn't need cleaning then you need to physically "roughen up" the nap (surface) with a stiff brush....a suede brush is ideal, but the stiff bristles of a nail brush would do....no spray is going to do the job!
You could (having gone over the whole coat as above) then spray it with something like Nikwax Nubuck and Suede Protection spray (Amazon et al) to help keep it looking it's best...and waterproof it, as a bonus.