t-cut is designed to restore dull finishes back to shiny - - not make them dull
the only way that happens is if you leave it covered in t-cut and out in the sun... buff it all off!!!
Yeah, it most definitely won't dull the finish, but as Wez says you need to be sure of removing all the residue. A soft cloth to rub it on (you don't need to use much) and another clean cloth to wipe off any residue and bring out the shine.
I used to use aerosol furniture polish to get rid of the T-Cut residue, but I read somewhere that it's important to make sure the polish is silicone-free, as silicone leaves its own residue which (I think) causes problems with refinishes or finish repairs.
It might also be desirable to use
wax-free polish, but I can't remember if that's right or not.
I'm rambling.... Wez, help me out?? :?