... car repair shop,iron panel, steel plate, stainless steel plate Application& CharacteristicQuantum Premium Lightweight Filler is unsurpassed sanding qualities ... an epoxy-enriched BPO catalyst.Scope of construction: Lightweight filler is fit for iron,steel ,aluminum ,galvanized sheet and ... alkyd primers, lest drop off or bubbles. Make sure filler has been completed drying while applying putty, or cause ...