PROTECT can be applied with a brush or a roller. You can use the same Reviver brush used for COLOUR. If applying with a roller, roll slowly, as rolling can cause bubbles.
Because the finish of PROTECT has a slightly higher sheen than COLOUR, apply in straight lines as best as possible.
Kellie's Tips: Be sure to apply in a generous amounts, as applying sparingly can cause streaking.
Kellie's Tips: If I am poly-ing a dark piece, I like to tint the poly with the paint. Because of the slightly higher sheen of Protect, it can show streaking if not applied carefully.
There's no real formula for doing this I just add COLOUR to PROTECT so that streaks are a non issue. Applying the PROTECT doesn't have to be done quite so carefully if tinted.
You can also apply PROTECT and apply COLOUR as your final coat. That provides the protection, without the additional sheen, which some prefer.