I was thinking about the same thing - the bulbs IIRC are an 8w/28w bulb. Normally, the 8w is on with the "parking lights" and the 28w is activated by the turn signals or 4-ways. You want the 28 watt filament to be on all the time, dimming to the 8W when the blinker is on. Would definitely be possible, but the only way I'm thinking would require some relays unless you want to hack into the wiring.
I want to do the same thing, use the inside marker lights as city lights/running lights, but still have them available as turn signals (the outer ones don't flash, only the fender markers).
BTW, good rule of thimb is never to use paper as an insulator - it gets wet (at which point it doesn't insulate) and when not wet it's flammable! STAY AWAY!