you are correct
digitally printed woodgrain looks terrible
no beating the old process 3m used ( uses ?)
(originally printed on a press.)
the matte finish hides any imperfections in the body
( waves, dents, etc )
I think trying to clear coat it would be a mistake,
I think it would eventually fail and make a big mess.
make sure you use their current "marine teak"
the color is almost exact as the old NOS material jeep used
but the grain is different, wish they would use the old grain pattern.
I have seen a wagoneer done using the new version of 3m's marine teak
it is the only, and the best alternative to NOS in my opinion.
( best source for 3M's current marine teak is metro restyling, they sell on eBay )
and any NOS is going to be old
and vinyl does have a shelf life.
dave in NC