Is There Any Way to Whiten Veneers?

You have a few options.
1 A professional dentist can whiten your teeth from behind 
2 whitening strips can remove lighter stains from the front part of the porcelain veneers.
3 We have a special paste that we use to brighten up veneers and give them back their shine, that's usually done at a prophylaxis appointment.
Hope this helps 
Joseph Goodman DDS, Beverly Hills 

I would recommend seeking professional consultation. There is a technique by which you could bleach the back side of the veneers using a custom-made tray designed especially for this purpose.