No first hand help with interior
polishing, however, we have polished two trailer exteriors with great success.
Polishing the interior
panels is the same as polishing the exterior
panels...there are many different ways to do it, but whichever way you chose it will be a very messy proposition best done with the interior components removed. There is a whole section dedicated to polishing here
, you will probably get the help you are looking for in one of these existing threads...good luck! And, welcome to the forums!