Used Ritrama O range for years before switching to 3M 50 series for general use.
Both perform almost identically being easy to cut, week & apply so long as you don’t mind working with one of the stickier products on the market.
Does suffer from light shrinkage over a few years. most noticeable on light vehicles and large areas of vinyl.
Not used the KMPF vinyl except in sample form many, many years ago. Didn’t like it at the time as a cut vinyl but apparently their wrap stuff is good.
Metamark – we use MD3 every day for print. Don’t like their vinyl much for cut vinyl as it’s not grabby enough on first contact but does have a very nice range of colours.
I’d make enquiries about the 3M 50 series with William Smiths as it’s comparable in price to the Ritrama.
Whatever you do – don’t buy the L&M series Ritrama, it’s only fit for putting in the bin…horrible, cheap stuff.
Dave