I used Interlux deck paint.Mediterranean White(# INTYKA184Q). I only bought a quart.Because you thin it,it's more that enough.
It is thinned with the Interlux 333 thinner and simply brushed on.
Painted mine back in 2004, still holding up just fine.
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71 blazer,350SBC,approx.375HP,700R4,factory GM TPI.Dual electric fans,33x12.5x15 ATR on stock suspension.
Petrolia,Ontario,Canada but working in Port Huron,MI.
See ALL my Blazer pic's
HERE