A bit too tough for me. I get started easy enough then grind to a halt fairly quickly.

I couldn't complete it, had a go at some guesses but ran out of logic too early.

These are filled in c22,r3 c24,r14-16 c18,r24. It will get you further and a shape should start appearing.

Mine looks right but it says it is invalid.
I don't understand where I'm going wrong.

Check around the hand and arm, that's where I found a solution that wasn't right.

Thanks, finally did it.

Okay c22,r12 c6,r17 & c16,r12-17.

Many thanks to Teesea - there remain ambiguities, yet it´s at least "guessable" :)

Just can't seem to get this right. Any more hints please?

C3,r20 c6,r8 c7,r9 c9,r10-12.

Thanks Teesea! :)