is it just me? i have an 87 crx si, and i can't get wax to stay on the hood, roof, and metal parts of hatch. seems to hold to vertical planes fine (fenders, doors, etc. ) i suck doing it by hand w/ spray and i can't put my plastic car thru an automatic wash. i've used the stalls where you brush and spray it and spray wax it. my wax lasts maybe 2-3 weeks. the paint is already faded on the roof and hatch. black paint if it matters.