is there a good spray mask for wood?

[Steve Maple]

you have to first seal the timber with varnish-thinned
-as the natural sap/oil in the timber will throw the mask off
then you can use what you like

[Paul Munford]

Thanks for the response barney.
The job was completed using ri-mark banner vinyl from Doro-tape
The stencil was 33 square meters and had over 500 Nike logos cut in it.
After trying various different vinyls we found banner vinyl worked really well as it is very flexible and didn’t react with the spray paint.