Oh no said hypothetical piece of wood would be MDF about 1/2 inch thick......8 x 4 ishplywood.. No, Brittle old fence panel.. perhaps.
Not unless said piece of wood had been sat in the wet untreated and was already falling apart.
If I was going to build a thing to shoot at... I would probably want to use plastic, or be sure to treat my boards in such a way that they were washable... as that way the paint won't sit on them and cause them to deteriorate.
Not legal advice but.
If however... said piece of wood is a fence... you may well be liable for damages regardless as paint will stain it... and can easily drip down the other side... also .. you might not own that fence.
Yeah it would only be for the odd occasional bit of shooting practice. I wouldn’t have the money to be at it all the time Just so I could loose a few hundred balls/ empty the air tank whilst we’re waiting for things to reopenWe put some real steal printed targets up onto sheets of plywood and covered with sheets of thick vinyl (probably 3mm)
These haven’t had heavy use but have survived occasional use