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Re: Spectrum Color Patch Paste
Suggest you go to a West Marine and purchase a color matching (small) gelcoat repair kit.
When in direct sunlight, use a glass plate on top of any neutral white material, and 'smear' (with trowel) the base gel repair material on it. Then make a decision on which 'primary color' must be added to the base gel in order to tint it.
Add only very very small amounts of tinting pigment at a time, then 'work' the trowel across the glass into order to completely and thoroughly mix the gel and the pigment.
When close to the hue desired on the glass, scrape some off and apply it to the area that you are repairing .... with NO catalyst added. If very close in hue add catalyst and apply. If not 'very very' close, keep adding very teeny amounts of 'color' until the hue is correct .... work 'up' to the correct hue/tint in small increments - and always thinking 'which is the correct primary color to add'. To remove any uncatalyzed 'test' samples smeared onto the surface to be repaired, simply wipe off with an acetone soaked rag, etc.
The advice for getting a computer matched supply of gelcoat is a good one. However, to do this you usually have to cut out a 3/4" diameter 'plug' from the hull/deck, etc. and send this to the entity that does the computer matching. The additional repair of that 3/4" diameter hole may be bit more than you bargained for ... in comparison to eyeball 'color matching' for a minor scratch.
FWIW: red + green = brown; Blue + yellow = green; red + blue = purple. You can obtain dial-in (hand-rotating) 'color matching cards' from most high quality paint stores and artist suppliers.
Do all the color matching in bright sunlight !!!!!!!
If youre near or over 50 years of age, get some 'young' person to verify the 'hue' before adding catalyst and applying: ....... especially if you've added any 'red', as old folks rapidly lose their ability to see and perceive 'red'.
Last edited by RichH; 12-02-2017 at 12:22 PM.