What tests are appropriate to ensure compatibility, post molding?

Visually evaluate the pultruded stock for exposed fibers and other surface defects. ASTM D4385 provides a test method for doing so.

If the pultruded stock off the line represents the final finish, then evaluating the part for color is important.

If the pultruded stock is to be painted, performing a paint adhesion test using a cross-cut technique, as with the ISO 2409 method, is generally used.