Just watched the Wan on You Tube and Linus mentioned about painting graphics cards and infilling the logo with another colour...in his case nail polish which as he discovered does not work.....so here are some tips on how to do it.
First of all I suspect Linus used Auto paint which is usually acrylic lacquer which is different from acrylic water based paint....do not use water based coatings, now the solvents used in auto paint are similar to nail polish and each will be aggressive with each other and dissolve or damage the coating .... this is important if you are infilling....you need a coating with which solvents won't react with the base coating in this case orange auto acrylic lacquer so to infill the logo it is best to use ordinary turpentine based enamel or auto grade enamel paint....in this case black enamel.
Now I watched Linus video when he attempted to infill and he was on the right track but some errors were made apart from the wrong product to infill with, the syringe and needle are fine but the viscosity was too thick....this needs thinning quite a bit.... a good rule of thumb is a mix of enamel paint mixed with turps into the syringe with a needle then gently squeezed until the thinned paint flows freely out of the needle without much pressure on the plunger.
Now this will seem too thin but it will flow smoothly into the logo and fill the bottom of the letter recess first until it climbs the walls of the letters....this step can be done in stages until you get the hang of it and can actually infill in one pass.
Now if the enamel mix flows a bit over the edge don't panic and try to wipe it away as all you will do is smudge everything and even if you do it's not a disaster.
What you have to do is let the enamel dry a bit....not fully dry ....just enough so that turps starts to dissolve it slowly when wiped with a turps rag....now a good idea is to get the left over in the syringe and squirt it onto to a waste bit of material so you can poke it with your finger or wipe it to gauge it's drying time. if there are any bubbles in your infill you can prick these with your needle but if it is mixed right you should have no worries.
now when the infill mix climbs the walls of your lettering or logo... some may spill slightly over the edge and with practice you will know when to stop but sometimes through capillary action you will get some infill paint making a spill over on the edge....the best way to get a nice clean edge is to get some cotton undies or such type cloth...cut into squares and tightly wrap around a small block of timber eg, ;..50 mm x 50 mm by 12mm or whatever...not to big...can use Aluminium( alyouminium) or plastic whatever you can find....now with the cloth wrapped tight around the face and with no loose pockets on the sides put a small amount of turps on the face of your rag block...not too wet but no dry spots either...just slippery....now gently wipe across the face of your sample and you will remove the excess black infill and this will leave the the orange background undamaged....you will see this coming off bit by bit...let the turps do the work don't put any grunt into this step.
Remember "you can paint Enamel over Acrylic..." "but not Acrylic over Enamel"....after completely dry you could wipe any smudges of with plastic polish or a light none gritty cleaner.
Good luck...be good to see some other effects like a deep gloss finish or Chameleon paint, glitter or metallic acrylics...cheers and best of luck.
Mike.
