Possible Clues:

• I'm finished with old painting technique
• Thick coat required, and top, as I'm shivering
• Renowned chemist is former European
• One medium no more � old painting technique
• One has little time to cover history of painting technique
• One way of working round previous artist's application
• Child with regard for thick paint
• For a painter, I am not futuristic round here
• The laying on of colours thickly
• Thickly-applied paint