Marine-Tex'able Repairs

1st crack at fiberglassing. I've been following po-man's fiberglass thread/adventure and wanted to throw some pics up to see if Marine-Tex will work for these repairs. The previous patches seem solid, should I grind these back to see what's underneath? Thanks for the advice.

Marine-Tex is the legendary high-strength repair compound designed for filling, bonding and rebuilding wood, fiberglass, ceramic, glass, metal,

Marine-Tex RM301K Marine-Tex - Gray, 2 oz.

Marine-Tex, the legendary high-strength repair compound, is designed for filling, bonding and rebuilding wood, fiberglass, ceramic, glass, metal,

Marine-Tex Epoxy Putty, Gray Gallon Kit

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Marine-Tex Epoxy Putty handles like putty, hardens like steel, and sands like wood.

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Using Marine Tex to repair a motor mount

Pettit EZ-Tex Marine Tex Epoxy Repair Compound 710010 710020 - NuWave Marine