colors are too thick from tube; in beginning, dilute paint with pure solvent for preliminary drawing and block in; then change to 50/50 medium & paint- preserves creamy consistency; keep cups clean, wipe brush hairs with towel/rag or rinse in solvent & dry with towelcolors are too thick from tube; in beginning, dilute paint with pure solvent for preliminary drawing and block in; then change to 50/50 medium & paint- preserves creamy consistency; keep cups clean, wipe brush hairs with towel/rag or rinse in solvent & dry with towel