Do you mean using both materials in order to formulate the coating? You will need to work out the best ratio of the resin to the crosslinker, and this will depend on the targeted properties of the coating.

You can use a single solvent or a combination of solvents, such as glycols, alcohols, hexane, cyclohexane, etc. Again, the choice of the solvent(s) would depend on your chosen curing/drying temperature/conditions, curing time, etc. You will need to know the targeted solids of your coating in order to determine the amount of solvent you should use.

You may need to use additives or fillers (pigment, for example) in order to control the properties of the coating, such as wetting, viscosity, dispersion stability, etc.

The attached document will hopefully explain the basics of the use of solvents, resins, crosslinkers and additives in coatings (although the document was aimed at can coatings).

thanks saminu for the valuable input and time. i am looking to use either of the material mentioned.

You may consider to dissolve melamine and urea (perhaps 1:1 mol/mol) in hot formalin (37% g/ml of formaldehyde in water/methanol sol.), while melamine should transform to methyl melamine.