No, they will separate.
Yes you can. Substitute 20% of the water for the cement mix with latex paint (Water based paint) and mix slow and thorough. Don't over used too much paint it will damage the integrity of the concrete.
Only if the 'flat paint' is water based too.
it will burn
well you can add water to 1 paint and then add no water to another paint then mix together. THEN YOU CAN PAINT BUT GO OVER THE PAINT A ROUGH 10 TIMES AND THEN YOU HAVE SHIMMERY PAINT.
Oil based paint Is paint is soluble in kerosene. Water based will not mix
Depends on the kind of paint: oil based paint will dissolve in, or at least mix with kerosine, water based will not (e.g. alkyds)
Spirit based is oil based and oil and water don't mix. Use paint thinner or mineral spirits.
Yes, since both are water based paints you can mix the to together.
Yes you can.
diesel / petrol hybrid mix (mainly); or slowly, whichever way you look at it.
You can't they just mix toghter-Juliet ,age 91
yes, most paints are solvents!