Hi Sean,
I remember a thread on ODK and a restorer used White knight Alpine Green with a custom tint but the mix was listed on
a linked image that is no longer working and I haven't seen that paint for sale recently.
Yes you can take a sample to a paint shop and get them to match the colour ,your choice of them putting the paint
into a spray can or you mixing the paint with thinners to use a spray gun and compressor.
Take a clean, unweathered part of your mower's base to a reputable automotive paint shop. They will be able to colour-match the green and potentially replicate the finish with a custom mix.
Remember that even with a custom mix, variations can occur due to paint application, curing, and the age of the original paint.
I don't know if there is anyone on ODK that has recently painted a Sheerline to have the paint mix but there should be
someone on a Facebook mower group that can tell you the mix.
Superior Finish: A spray gun atomizes paint into much finer particles, resulting in a smoother, more even, and professional-looking finish .
Cheers
Max.