Up to now i have stuck with the mr sheen for coating the inside and outside pvc , old dogs new tricks spring to mind,as i have never tried it would the stuff on the link below be correct,also do you do the entire dandy pvc with it inside and out and do you give it a buff with a cloth after.
[You must be registered and logged in to see this link.]
[You must be registered and logged in to see this link.]