Painting might not be difficult, but a paint sprayer makes it a bit easier. No need to look for a power outlet, since it runs on batteries. Just get at it!
From Amazon
WAGNER Filter M for WAGNER Paint Sprayers Control Pro 250M/250R/350M/350R, Set of 2 Pieces , Yellow
Conrad Electronic
Wagner M Filter Compatible with Wagner Control 150 M, Control Pro 250 M, 250 R, 350 M, 350 R