GMC
GMC
Paint colour code 646HM
Standard shade
We mix 646HM to the standard factory shade for this code. Paint fades and shifts with a vehicle’s age and sun exposure, so an older panel may not match exactly — bring in a sample panel or part and we’ll match to it instead.
Looking for the GMC 646HM colour code? This is Rally Charcoal, a metallic finish used on GMC vehicles 2001 - 2009. Order it mixed to code below, from a touch-up bottle up to a full 5-litre tin.
Pick a size below — the colour, code and make are already filled in for you.
This is a 2-stage colour (Metallic)
As well as this basecoat, you'll need a clearcoat/lacquer to finish it. Add it below.
Tell us the colour to mix — a name, a code, or both.
If it came off a vehicle, this helps us match the exact factory shade.
Caslek HS Lacquer — pick a size to go over the basecoat above.
Prefer a spraycan? FT PAINTS LTD - CLEAR clear lacquer aerosol, ready to spray straight over the basecoat.
The same steps whether you’re spraying a full panel with a gun or touching in a stone chip with the bottle brush — just fewer coats and a smaller area for touch-ups.
GMC
GMC
GMC
Paint colour code 646HM
Standard shade
We mix 646HM to the standard factory shade for this code. Paint fades and shifts with a vehicle’s age and sun exposure, so an older panel may not match exactly — bring in a sample panel or part and we’ll match to it instead.
Looking for the GMC 646HM colour code? This is Rally Charcoal, a metallic finish used on GMC vehicles 2001 - 2009. Order it mixed to code below, from a touch-up bottle up to a full 5-litre tin.
Pick a size below — the colour, code and make are already filled in for you.
This is a 2-stage colour (Metallic)
As well as this basecoat, you'll need a clearcoat/lacquer to finish it. Add it below.
Tell us the colour to mix — a name, a code, or both.
If it came off a vehicle, this helps us match the exact factory shade.
Caslek HS Lacquer — pick a size to go over the basecoat above.
Prefer a spraycan? FT PAINTS LTD - CLEAR clear lacquer aerosol, ready to spray straight over the basecoat.
The same steps whether you’re spraying a full panel with a gun or touching in a stone chip with the bottle brush — just fewer coats and a smaller area for touch-ups.
GMC
GMC
Not on sound existing paintwork — spraying straight over a clean, keyed surface is fine. Bare metal or bare plastic needs primer first (see step 2 of the full respray guide above).
Yes — Rally Charcoal is a 2-stage colour, so a dab of clearcoat over the repair once the basecoat has hardened gets the gloss to match the rest of the panel.
Plenty for stone chips and small scratches. For anything bigger than a coin-sized area, or more than a handful of chips, go up to the 150ml or 250ml size in the builder above.
The same Rally Charcoal mixed to code either way — the aerosol is the basecoat pre-loaded into a spray can for panel-sized touch-ins, while the tins and bottles are for gun or brush application.
GMC
GMC
Not on sound existing paintwork — spraying straight over a clean, keyed surface is fine. Bare metal or bare plastic needs primer first (see step 2 of the full respray guide above).
Yes — Rally Charcoal is a 2-stage colour, so a dab of clearcoat over the repair once the basecoat has hardened gets the gloss to match the rest of the panel.
Plenty for stone chips and small scratches. For anything bigger than a coin-sized area, or more than a handful of chips, go up to the 150ml or 250ml size in the builder above.
The same Rally Charcoal mixed to code either way — the aerosol is the basecoat pre-loaded into a spray can for panel-sized touch-ins, while the tins and bottles are for gun or brush application.
GMC
GMC