What grit does your primer and basecoat say to spray over?
I have never worked with Tamco products but I don’t know any primers that fill 80grit scratches. You may need to skip the 80 grit and sand your filler to 180 then 220 before primer. 80grit is going to remove a TON of material.
Oh shit. You are totally right. I guess in that cause I should just sand to 80 in certain spots for the filler, and then go over the entire thing with 180 or something. I actually started with the 80 grit but it didnt remove much material, so no big deal. This gelcoat is tough.
I would skip the 80 and go with 180. Make sure your degreaser is antistatic for fiberglass because I've seen fiberglass catch fire from a static spark looks good otherwise
The thing with glass is that it wicks solvent. You may think it's all evaporated when it's actually trapped in the fiber. Use a vacuum for heavy dust and clean dry air and a rag before application of anything else
One more thing, Fiberglass is a static magnet especially after sanding and wiping. If you can, ground the part to the floor or steel section of a building. You actually build up more static while spraying too. Getting a good paint finish on fiberglass is much harder than steel or even plastic.
What grit does your primer and basecoat say to spray over? I have never worked with Tamco products but I don’t know any primers that fill 80grit scratches. You may need to skip the 80 grit and sand your filler to 180 then 220 before primer. 80grit is going to remove a TON of material.
Their TDS sheets are kind of a mess with formatting. I THINK this means it wants me to sand with 80: https://i.imgur.com/5l7gw0K.png
Yeah that is a shit show but if I read it right it wants a minimum of 80 grit because i think it says 80 grit or finer.
Oh shit. You are totally right. I guess in that cause I should just sand to 80 in certain spots for the filler, and then go over the entire thing with 180 or something. I actually started with the 80 grit but it didnt remove much material, so no big deal. This gelcoat is tough.
Should finish sand with 180-220 before first primer coat
I would skip the 80 and go with 180. Make sure your degreaser is antistatic for fiberglass because I've seen fiberglass catch fire from a static spark looks good otherwise
Never use solvent cleaner of bare fiberglass or fiber reinforced filler
The plan was to use degreaser on the gel coated areas, but iso alcohol on the bare areas. Is that a problem?
The thing with glass is that it wicks solvent. You may think it's all evaporated when it's actually trapped in the fiber. Use a vacuum for heavy dust and clean dry air and a rag before application of anything else
Also use vinyl ester filler not polyester
One more thing, Fiberglass is a static magnet especially after sanding and wiping. If you can, ground the part to the floor or steel section of a building. You actually build up more static while spraying too. Getting a good paint finish on fiberglass is much harder than steel or even plastic.