Model Boat Mayhem

Technical, Techniques, Hints, and Tips => Painting, Finishing and Care. => Topic started by: Jonty on May 20, 2007, 07:07:23 pm

Title: Paint compatibility
Post by: Jonty on May 20, 2007, 07:07:23 pm

Help!

Was just about to spray Plastikote onto Holts primer, when it occurred to me that they may not be compatible.

Anyone know the answer?

Title: Re: Paint compatibility
Post by: Shipmate60 on May 20, 2007, 07:37:06 pm

I dont know the answer so why not try it on a piece of scrap then tell US.

Bob

Title: Re: Paint compatibility
Post by: Tug-Kenny RIP on May 20, 2007, 08:22:03 pm

Paint can be a funny thing,  with a mind of its own.

Today, I didn't like the colour brown on one of my shapes ( in the Humbrol range)  and decided to repaint it over with Humbrol white.

Yes,, you've guessed it,  the Bl****  lot curdled.    :o

I shall be be more wary next time, and keep away from changing colours


Cheers...Ken

Title: Re: Paint compatibility
Post by: chingdevil on May 22, 2007, 12:53:24 pm

I know Halfords car paints do not like Humbrol Paint, you get a very nice crinkly effect from that.

The other Brian

Title: Re: Paint compatibility
Post by: Stavros on May 22, 2007, 08:08:33 pm

Absoloutly no problem at all hte only problem is if you go the other way ie holts on plasticoat.What you have got to remember is not to use car paints ever again on top of teh plasticoat as it will react.Trust me on this one I should know as I am  paintsprayer by trade ;)Stavros

Title: Re: Paint compatibility
Post by: Jonty on May 22, 2007, 09:16:34 pm

Thanks, Stravros et al.

Title: Re: Paint compatibility
Post by: RickF on May 22, 2007, 10:57:30 pm

An old "painter and doper" once told me that the way to remember it was: "You put Salt on Chips (Synthetic on Cellulose), but not chips on salt".

Years ago this was straightforward. However now the trick is identifying which is the synthetic and which the cellulose!

Rick

Title: Re: Paint compatibility
Post by: Stavros on May 22, 2007, 11:15:41 pm

Easy the enamel smells like house paint and the cellulose/acrylic is similar to pear drops stavros

Title: Re: Paint compatibility
Post by: GreeboTheCat on May 24, 2007, 04:45:35 pm

I was told that it's the thinners in use that can cause problems - If you spray cellulose first, once it hits the surface of the thing your spraying, the thinning medium starts evaporating and the paint dries out. Once it's dry, it's just paint so you can then spray on top with enamal or acrylic. Going the other way - spraying enamel first and then spraying cellulose next - the thinning medium in the cellulose attackes the enamel paint as its drying - result: an attack of the crinkles.  Here endeth the lesson. Stands well back ready to be flamed!!!!! ;D

Greebo

Title: Re: Paint compatibility
Post by: boatmadman on May 24, 2007, 04:51:22 pm

Quote from: Stavros on May 22, 2007, 11:15:41 pm

Easy the enamel smells like house paint and the cellulose/acrylic is similar to pear drops stavros

Unless you have no sense of smell!