Flying time from Mexico City, Mexico to Washington, DC. The total flight duration from Mexico City, Mexico to Washington, DC is 4 hours, 16 minutes. This assumes an average flight speed for a commercial airliner of 500 mph, which is equivalent to 805 km/h or 434 knots. It also adds an extra 30 minutes for take-off and landing.
MDF sometimes comes pre-primed, but if yours isn't, then you should prime the surface before painting. You can use any type of water-based primer, such as an emulsion paint or an acrylic primer.This base-coat of primer will help give the top coat a truer shade and will prevent it from being affected by the color of the board. do painting of mdf all the time. Water based undercoat is fine but i prefer two coats. then i use eggshell, oil based finish once. that should always be enough.
1 Using a Paint Primer For MDF-Primers used for mdf should be solvent rather than water based. ( 2 lacquer or enamel, rather than acrylic).3  Stain covering primers (Zisser makes one in a spray can) have heavier body and can be used for the edges as well as flat and detailed surfaces. Sealing MDF with PVA Glue-To seal the edges (or flat surfaces) you can spread or spray a layer of thin PVA (white or carpenter's) glue over the edge with a glue spreader, or a pump spray bottle or air brush, making sure the glue layer is as even as possible, with no build up at the edges.