[boatbob2]

Listen up.as others have posted,forget the cloth,youre not making a surfboard. use only 1 1/2 oz mat,3 layers should be enough,4 layers if youre worried about it,or 10 if you want to support a truck. use a grooved roller(fg supply house) roll the lay up, while it is wet and still soft.as you roll the bubbles out , you will see it get smooth. dont let the glascoats harden,do the rolling when the whole layup is wet. . after you finish up,put an extra coat of poly resin on top .wait til it gets hard. if it gets hard but still sticky,throw it in the swimming pool,or a big bucket of water. that will cut off the air,and allow it to get hard, or just use a hose. really soak it. spray a coat of black spray paint (spray can is ok,) then with a long board sander and probably 80 grit paper,start sanding, the mat buildup,will allow quite a bit of sanding before you break thru.when youve got it pretty smooth,not much black showing THEN use a LITTLE BIT of bondo to make it smooth. then show everyone what a nice job you did

[John Fehlberg]

Thats find to use cloth first and cover it with mat, the mat will block the pattern and no problem to use bondo over that. Bondo is just a filler.
John

[302 Z28]

Don't forget about polyester fleece also. It molds around compound curves easily.

Vince