I wrap the project in painter tape first, then apply the pattern on top with glue and then an other wrap with clear packing tape.
my problem is also sawdust on top if I didn't apply the clear tape nice and smooth.
but that's just paying More attention when applying the tape.
my biggest problem is the bottom.
there are alway little bumps where the hole is coming trough.
this is from some fuzzie/splinter from drilling.
tried slow and higher drill speed, but no results there.
and then while sawing the sawdust will make the little bumps just a little bigger because it's getting between wood and tape.
due to the bumps my work wants to sloop/bevel and when cutting on close parts it's getting wrong.....
ideas welcome