Refillable Permanent Marker P20 Bullet, Box of 10 Red productline_Accessory/spare pArts you can use your finger

you can use your finger to smudge or blend them with a paint brush and turpentine

In addition

The Multimark fibre tip universal pen with integrated special eraser reliably writes on almost all surfaces

The graphite stain can be easily erased thoroughly with Faber-Castell Exam Grade eraser

Refillable Permanent Marker P20 Bullet, Box of 10 Red productline_Accessory/spare pArts you can use your fingerRefillable Marker that is able to mark on most surfaces ie. plastic, glass, metal, carton & etc. Durable bullet nib to cater for different usage. Permanent Ink (fade proof & water proof) with high intensity to ensure the writing will stay for very long time. Marker comes with clip ideal for carrying around.